Other questions and answers in December 2015

what is the problems associated with determining the density of the universe?
Based on chemiosmosis, hydrogen ions accumulate in the ______ of the mitochondrion to create a large electrochemical gradient for aerobic cellular respiration. A)     intermembrane space B)     in...
Which molecule is the final acceptor of electrons at the end of the electron transport system in aerobic cellular respiration? A)     oxygen B)     carbon dioxide C)     lactate D)     citrate...
Which molecule will combine with the four-carbon oxaloacetate in the Krebs cycle to form the six-carbon citrate? A)     two carbon dioxide molecules B)     lactic acid C)     NADH D)     FADH ...
Which of the following molecules is NOT formed as a result of the Krebs cycle during aerobic cellular respiration? A)     carbon dioxide B)     ATP C)     water D)     NADH E)     FADH2
Which pathway will result in the production of four carbon dioxide molecules, two ATP molecules, NADH2 and FADH2? A)     glycolysis B)     transition reaction C)     Krebs cycle D)     Calvin ...
When a substrate is oxidized (as in cellular respiration)     , energy is released and the coenzyme NAD becomes NADH + H+. A)     True B)     False
How many times does the Krebs cycle turn per glucose molecule? A)     once B)     twice C)     three times D)     four times E)     five times
Which of the following series of enzymatic reactions begins and ends with citrate? A)     Krebs cycle B)     electron transport system C)     transition reaction D)     glycolysis
Which of the following pathways will result in carbon dioxide and NADH2 being released but not ATP? A)     glycolysis B)     Krebs cycle C)     electron transport system D)     transition reac...
Which of the following pathways will use coenzyme A during aerobic cellular respiration? A)     glycolysis B)     transition reaction C)     Krebs cycle D)     electron transport system E)   ...
Which of the following statements about the transition reaction is NOT correct? A)     It occurs in the matrix of mitochondria. B)     It links glycolysis to the Krebs cycle. C)     Two oxygen m...
Glycolysis can be used in both aerobic cellular respiration and fermentation. A)     True B)     False
Pyruvate is the end product of the ______ reactions. A)     Krebs cycle B)     Calvin cycle C)     electron transport system D)     glycolysis E)     transition
Describe the discovery of cosmic microwave background (CMB)  radiation by Penzias and Wilson.
Which of the following statements is NOT correct about glycolysis? A)     Glycolysis takes place within the cytoplasm. B)     Glycolysis uses two ATP but forms four ATP, resulting in a net gain of...
Which of the following statements is NOT true about NAD? A)     Only a small amount of NAD is needed in cells. B)     NAD can only be used once before it must be resynthesized. C)     NAD can ac...
Which of the following statements is correct? A)     NAD is reduced and becomes NADH2 when it accepts hydrogen atoms. B)     NAD is oxidized and becomes NADH when it accepts hydrogen atoms. C)   ...
Which coenzyme is used in cellular respiration? A)     NAD+ B)     NADP C)     niacin D)     alcohol dehydrogenase E)     cytochrome oxidase
Which of the following statements about aerobic cellular respiration in the human body is NOT correct? A)     Glucose and oxygen are delivered to the cells by the bloodstream. B)     Carbon dioxid...
The carriers for the electron transport system are located ______. A)     within the cytoplasm of a cell B)     on the cristae of mitochondria C)     within the matrix of mitochondria D)     w...
Which of the following pathways does NOT occur in aerobic cellular respiration? A)     glycolysis B)     Krebs cycle C)     electron transport system D)     transition reaction E)     Calvin...
Which of the following statements is NOT correct regarding aerobic cellular respiration? A)     Cells would lose too much energy as heat if they used glucose directly for individual reactions. B)  ...
During aerobic cellular respiration, which molecule originates from the digestive system? A)     oxygen B)     carbon dioxide C)     ATP D)     water E)     glucose
Which pathway for aerobic cellular respiration is located in the cytoplasm of the cell? A)     glycolysis B)     Krebs cycle C)     electron transport system D)     transition reaction E)   ?...
Which of the following molecules will diffuse out of the cell, enter the bloodstream, and be released from the lungs during aerobic cellular respiration? A)     oxygen B)     carbon dioxide C)   ...
Glucose breakdown is ____. A)     an endergonic reaction proceeding from low-energy molecules to high-energy molecules B)     coupled with ATP breakdown C)     combined with carbon dioxide to fo...
Which lymph nodes could not be palpated with the fingers?
What traits characterize antigens?What traits characterize antigens?
A vaccination is an example of _____ immunity.A vaccination is an example of _____ immunity.
The elbow is __________ to the wrist. A)     distal B)     inferior C)     lateral D)     medial E)     proximal
The increase in antibody levels in a second antigen exposure is due to the _____.
The scapula (shoulder blade)      is __________ to the lung. A)     dorsal B)     posterior C)     superficial D)     all of these
Which of these descriptions does NOT apply correctly to a person in the anatomic position? A)     standing erect B)     head facing forward C)     feet facing forward D)     arms hanging to th...
A term that means "away from the midline" is: A)     distal B)     lateral C)     medial D)     proximal E)     superior
To maintain homeostasis, the normal range of values for a variable A)     is always below the set point. B)     may change in different situations. C)     may not deviate from the set point. D) ...
According to the concept of negative feedback, a slight increase in blood pressure causes A)     an increase in heart rate. B)     a decrease in heart rate. C)     no change in heart rate.
Failure of negative-feedback mechanisms to maintain homeostasis A)     may produce disease. B)     occurs when blood pressure increases during exercise. C)     can be corrected by stimulating po...
Which of these processes illustrates positive-feedback? A)     increase in respiratory rate during exercise B)     increase in heart rate when blood pressure decreases C)     shivering when body...
A body temperature of 98.6 degrees F (37 degrees C)      is the __________ for body temperature. A)     constant B)     lower limit C)     normal range D)     set point E)     upper limit
Given these terms related to negative-feedback: 1. control center 2. effector 3. receptor 4. response 5. stimulus   Arrange them in the correct order as they operate to maintain homeostasis. A)    ...
The specific source of antibodies is the _____.The specific source of antibodies is the _____.
Development is a process that begins with fertilization and ends with A)     birth. B)     adolescence. C)     adulthood. D)     old age. E)     death.
Which of these characteristics of life helps maintain homeostasis when environmental conditions change? A)     growth and development B)     metabolism C)     organization D)     reproduction ...
Which organ system consists of hormone-secreting glands, such as the pituitary and thyroid glands? A)     endocrine B)     integumentary C)     lymphatic D)     respiratory E)     urinary
Which organ system consists of skin, hair, nails, and sweat glands? A)     endocrine B)     integumentary C)     lymphatic D)     respiratory E)     urinary
Which organ system removes substances from the blood, combats disease, maintains tissue fluid balance, and absorbs fat from the digestive tract? A)     endocrine B)     integumentary C)     lymp...
The basic living unit of all plants and animals is the A)     cell. B)     chemical. C)     organ. D)     organelle. E)     tissue.
A group of cells with similar structure and function, together with the extracellular substances located between them, form a(n)      A)     organism. B)     organelle. C)     tissue. D)   ?...
Ultrasound, X-rays, CT, and MRI are all examples of A)     anatomic imaging. B)     surface anatomy. C)     regional anatomy. D)     gross anatomy. E)     cytology.
The study of tissues is called A)     cytology. B)     anatomy. C)     histology. D)     anatomic imaging. E)     physiology.
_____________ investigates the body's structure, whereas __________ investigates the processes or functions of living things. A)Physiology, cytology B)Physiology, anatomy C)Anatomy, histology D)Histol...
How has the Cold War shaped the U.S.-Japan relationship in terms of their economic and security relations, especially given the loss of Northeast China to the communists?
finish the following sentence: Le français est une ................très facile à ....................
Which muscle metabolism waste product is eliminated by the kidneys? A)        urea B)        uric acid C)        creatine D)        creatinine
Which of the following are not found in the glomerular filtrate? A)        glucose B)        protein C)        uric acid D)        creatinine
Which process is most affected by blood pressure? A)        tubular secretion B)        tubular reabsorption C)        glomerular filtration D)        loop of Henle diffusion
Which blood vessels surround the loops of Henle? A)        vasa recta B)        peritubular capillaries C)        interlobular arteries D)        efferent arterioles
Which blood vessel conveys blood out of the nephron? A)        efferent arteriole B)        vasa recta C)        peritubular capillary D)        interlobular vein
Which area actually secretes renin into the blood? A)        macula densa B)        juxtaglomerular apparatus C)        juxtaglomerular cells D)        cortical nephron
The last part of a nephron is the _____. A)        collecting duct B)        renal papilla C)        distal convoluted tubule D)        glomerulus
Which section of the nephron is after the ascending limb of the loop of Henle? A)        descending limb of the loop B)        proximal convoluted tubule C)        distal convoluted tubule...
The renal corpuscle is comprised of a glomerulus and _____. A)        proximal convoluted tubule B)        Bowman's capsule C)        loop of Henle D)        distal convoluted tubule
Which blood vessel delivers blood to the cortex? A)        interlobular artery B)        arcuate artery C)        interlobar artery D)        efferent arteriole
How much of the cardiac output passes through the kidneys? A)        10% B)        25% C)        50% D)        65%
What is the function of the renal system? A)        maintain blood pH B)        regulate blood pressure C)        control blood concentration D)        all of these
The kidney secretes _____, which is an enzyme-hormone that raises blood pressure. A)        aldosterone B)        renin C)        angiotensinogen D)        angiotensin II
The kidney secretes _____ for the purpose of stimulating bone marrow activity. A)        renin B)        aldosterone C)        erythropoietin D)        somatomedin
What is the basic functional unit of the kidney? A)        alveolus B)        renal pyramid C)        renal pelvis D)        nephron
The striated appearance of the pyramids is caused by _____. A)        parallel blood vessels B)        microtubules C)        connective tissue D)        nerve fibers
The renal pyramids are located within the _____. A)        column B)        cortex C)        medulla D)        pelvis
Each minor calyx receives urine from the _____. A)        renal papillae B)        pelvis C)        ureter D)        columns
Which structure is the first to collect the urine? A)        pelvis B)        calyx C)        ureter D)        urethra
The entrance into the kidney is called the _____. A)        sinus B)        renal column C)        hilum D)        pyramid
The kidneys are located in the _____ space. A)        pelvic cavity B)        peritoneal cavity C)        abdominal D)        retroperitoneal
The kidneys are located in the _____ space. A)pelvic cavity B)peritoneal cavity C)abdominal D)retroperitoneal
The outermost covering of the kidney is the _____. A)cortex B)medulla C)pelvis D)capsule
The deeper layers of the skin are comprised of _____ tissue cells. A)        adipose B)        loose connective C)        fibrous connective D)        elastic connective
The _____ fibers cause a tissue to return to its original shape after distention. A)        collagen B)        elastic C)        reticular D)        muscular
The source of the anticoagulant heparin is the _____ cell. A)        mast B)        macrophage C)        fibroblast D)        neutrophil
Which cells are the first to phagocytize foreign particles in the tissues such as bacteria in a wound? A)        fibroblasts B)        white blood cells C)        macrophages D)       ...
The _____ cells are the ones that produce collagen. A)        fibroblast B)        macrophage C)        wandering cells D)        histiocytes
The background that connective cells is in is termed the _____. A)        ground substance B)        matrix C)        fiber network D)        stroma
The _____ tissue has the most numerous and diverse types of cells. A)        nervous B)        connective C)        muscle D)        epithelial
The sebaceous glands of the skin produce secretions by the _____ method of secretion. A)        merocrine B)        eccrine C)        holocrine D)        apocrine
The protein mucin is found in cells lining the _____. A)        outside of the skin B)        covering of the heart C)        inside of the intestines D)        fingernails
Cells that secrete fluids without losing their internal structure are _____ secreting, in type. A)        merocrine B)        apocrine C)        holocrine D)        simple
The _____ lining of the urinary bladder allows it to stretch without tearing or losing integrity. A)        cuboidal B)        transitional C)        muscle D)        squamous
The most protective and driest cells of the body are the _____ cell types. A)        connective tissue B)        nervous C)        stratified squamous epithelial D)        pseudostrati...
Cilia have the function of removing foreign particles and mucus from the surface of the _____ system. A)        digestive B)        reproductive C)        integumentary D)        respi...
The respiratory passages are lined with _____ cells. A)        columnar B)        cuboidal C)        transitional D)        pseudostratified columnar
Microvilli are found on the apical surface of _____ cells. A)        simple columnar B)        transitional C)        pseudostratified D)        squamous
The gastrointestinal tract is primarily lined with _____. A)        transitional cells B)        stratified squamous epithelium C)        simple columnar epithelium D)        connectiv...
Simple _____ epithelial cells are specialized for secretion and are found in glands such as the pancreas. A)        columnar B)        cuboidal C)        squamous D)        transitiona...
The air sacs in the lungs are comprised of _____ cells. A)        simple squamous B)        simple columnar C)        simple cuboidal D)        transitional
Which tissue is thin and specialized for the diffusion of gases and ions? A)        cuboidal epithelial B)        connective C)        simple squamous epithelium D)        simple colum...
The _____ tissue is considered a type of lining for body areas. A)        epithelial B)        connective C)        nervous D)        muscle
The following belong together except which one? A)        epithelium B)        bone C)        connective D)        nervous
A group of cells that performs a specific function is organized as a _____. A)        organ B)        tissue C)        system D)        organelle
The chin can be described as being on the _____ surface of the skull. A)  inferior B)  lateral C)  superior D)  dorsal
A tumor on the side of the abdomen can be described as being on the _____ surface of the body. A)  anterior B)  lateral C)  medial D)  posterior
Which of the following terms means the same as ventral in humans? A)  dorsal B)  posterior C)  medial D)  anterior
Which of the following includes the other terms? A)  cell B)  tissue C)  system D)  organ
What is the smallest level of organization considered to be living? A)  cell B)  organelle C)  tissue D)  system
A study dealing with the explanations of how an organ works would be an example of _____. A)  anatomy B)  cytology C)  teleology D)  physiology
Anatomy is a term which means the study of _____. A)  physiology B)  morphology C)  cell functions D)  human functions
The human liver is primarily located in the _____________________. A)  right upper quadrant of the abdominal area B)  left lower quadrant of the abdominal area C)  right iliac region D)  left hypo...
A ______________ section divides the body into right and left portions. A)  coronal B)  transverse C)  sagittal D)  oblique
The lower arm is _____________ to the stomach area, while the head is ________________ to the stomach. A)  medial; peripheral B)  proximal; anterior C)  lateral; superior D)  inferior; superficial
The ______________ system includes all the glands that secrete hormones. A)  muscular B)  lymphatic C)  nervous D)  endocrine
The ____________ system is responsible for transporting tissue fluid and also houses the body's disease-fighting cells. A)  integumentary B)  cardiovascular C)  lymphatic D)  digestive
The lungs are covered by a membrane called the _______________. A)  parietal pleura B)  visceral pleura C)  parietal pericardium D)  peritoneum
The _____________ cavity is the portion enclosed by the hip bones. A)  abdominopelvic B)  pelvic C)  abdominal D)  thoracic
The ______________ of the body includes the head, neck, and trunk. A)  dorsal cavity B)  appendicular portion C)  ventral cavity D)  axial portion
Skin or bone is an example of what level of organization? A)  tissue B)  cell C)  macromolecule D)  organ
Which of the following is the most complex level of organization? A)  organ system B)  macromolecule C)  organ D)  organelle
Most of the body's homeostatic mechanisms operate by negative feedback, although a few function through positive feedback. Choose the example from the list below that operates by positive feedback. A)...
All organisms share a set of basic requirements. These include all of the following, with the exception of _____________, which is not required by all organisms, even if it is present in many. A)  ca...
Which one of the following traits is not a characteristic of life shared by all organisms? A)  circulation B)  digestion C)  growth D)  photosynthesis
Select the correct statement about the science of anatomy. A)  Our knowledge of human anatomy has remained the same since the time of the ancient Greeks and Romans. B)  Anatomy is concerned with the...
Which field, when compared to the others, tends to rely more on experimentation to find new answers? A)anatomy B)physiology C)medical terminology D)history of science
I need a french essay proof read for grammar and spelling mistakes. Please highlight all mistakes with the corrections you made.  Essaie 4 Caitlin Finn 1210755 Je travaille à la Banque de Nouvelle-E...
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because
Which inflammatory response provides the greatest protection from the spread of pathogens?
A nonspecific class of chemicals that can inhibit viruses and cancer cell growth is _____.
What would happen if the pectoral lymph nodes were removed during a surgical procedure?
The elbow is __________ to the wrist. A)                       distal B)                       inferior C)                       lateral D)                   ...
The scapula (shoulder blade)                        is __________ to the lung. A)                       dorsal B)                       posterior C)            ...
Which of these descriptions does NOT apply correctly to a person in the anatomic position? A)                       standing erect B)                       head facing forward C)...
A term that means "away from the midline" is: A)                       distal B)                       lateral C)                       medial D)               ...
To maintain homeostasis, the normal range of values for a variable A)                       is always below the set point. B)                       may change in different situat...
According to the concept of negative feedback, a slight increase in blood pressure causes A)                       an increase in heart rate. B)                       a decrease ...
Failure of negative-feedback mechanisms to maintain homeostasis A)                       may produce disease. B)                       occurs when blood pressure increases during...
Which of these processes illustrates positive-feedback? A)                       increase in respiratory rate during exercise B)                       increase in heart rate when...
A body temperature of 98.6 degrees F (37 degrees C)                        is the __________ for body temperature. A)                       constant B)                 ?...
Given these terms related to negative-feedback: 1. control center 2. effector 3. receptor 4. response 5. stimulus   Arrange them in the correct order as they operate to maintain homeostasis. A)    ...
Development is a process that begins with fertilization and ends with A)                       birth. B)                       adolescence. C)                       ad...
Which of these characteristics of life helps maintain homeostasis when environmental conditions change? A)                       growth and development B)                       m...
Which organ system consists of hormone-secreting glands, such as the pituitary and thyroid glands? A)                       endocrine B)                       integumentary C)  ...
Which organ system consists of skin, hair, nails, and sweat glands? A)                       endocrine B)                       integumentary C)                       ...
Which organ system removes substances from the blood, combats disease, maintains tissue fluid balance, and absorbs fat from the digestive tract? A)                       endocrine B)     ...
The basic living unit of all plants and animals is the A)                       cell. B)                       chemical. C)                       organ. D)        ...
A group of cells with similar structure and function, together with the extracellular substances located between them, form a(n)                        A)                       ...
Ultrasound, X-rays, CT, and MRI are all examples of A)                       anatomic imaging. B)                       surface anatomy. C)                       regio...
The study of tissues is called A)                       cytology. B)                       anatomy. C)                       histology. D)                   ?...
_____________ investigates the body's structure, whereas __________ investigates the processes or functions of living things. A)Physiology, cytology B)Physiology, anatomy C)Anatomy, histology D)Histol...
(Japan history) please explain how did the feudal system work
what is the relationship between period and absolute magnitude for Cepheid variables?
A condition in which there is a congenital predisposition for a ruptured aorta is _____________.
A deep wound to the upper thigh might damage the _____________ artery.
The _____________ has the thickest wall because it pumps blood to the ________________.
In which way has science NOT improved our lives? A)                       discovery of antibiotics B)                       increased ethical and moral values C)           ?...
The general approach scientists employ to gather information is known as the _____. A)                       random-choice method B)                       scientific method C)  ...
Which theory states that life comes only from life? A)                       Cell Theory B)                       Gene Theory C)                       Biogenesis Theor...
Which theory states that all living things have a common ancestor and are adapted to a particular way of life? A)                       Cell Theory B)                       Gene ...
Which theory states that all organisms are composed of cells? A)                       Cell Theory B)                       Gene Theory C)                       Biogen...
Which theory states that organisms contain coded information that dictates their form, function, and behavior? A)                       Cell Theory B)                       Gene ...
There are no advantages of reporting a scientific experiment in a scientific journal other than that it allows other researchers to repeat the experiment by knowing how the experiment was conducted. A...
The ______ theory enables scientists to understand the history of life, the variety of living things, and the development of organisms. A)                       cell B)              ...
A theory that is accepted by many scientists sometimes is called a ______. A)                       hypothesis B)                       law C)                       re...
In the design of a controlled experiment to test if a sweetener is a safe food additive, genetically different mice are nonrandomly divided into the control group and the test groups. A)         ?...
Which of the following has the greatest amount of evidence for being "true"? A)                       hypotheses B)                       conclusion C)                  ...
What is usually the last step in the scientific method? A)                       accumulate scientific data B)                       formulate a hypothesis C)             ?...
Statistical tests from an experiment are often run to determine if there is a significant difference between the experimental variable and the dependent variable. A)                       T...
Scientists usually report their mathematical data obtained from experiments in a table or graph. A)                       True B)                       False
After conducting an experiment, scientists will usually report their findings in a newspaper article. A)                       True B)                       False
A control sample goes through all the steps of the experiment except the one being tested. A)                       True B)                       False
The experimental variable in a controlled experiment is the result or change that is observed. A)                       True B)                       False
Hypotheses can never be proven true. A)                       True B)                       False
A ______ is a conceptual scheme that is supported by a large number of observations and not found lacking. A)hypothesis B)law C)result D)theory E)principle
Which statement is false about science? A)Science helps us to understand the natural world. B)Science is objective rather than subjective. C)Science has to be repeatable. D)Science should be published...
A hypothesis is ______. A)a conceptual scheme supported by many experiments B)a result of deductive reasoning C)a tentative explanation of the results D)a tentative explanation of observed phenomena
When atoms of different elements combine they form _____. A)               gases B)               compounds C)               molecules D)               ionic bonds
Buildings that contain radon in their structures can cause illness because radon will _____. A)               chemically react with human tissues B)               produce ionizing radiat...
Carbon atoms tend to form _____. A)               covalent bonds B)               cations C)               anions D)               ionic bonds
A covalent bond is formed whenever two atoms ______ electrons. A)               lose B)               share C)               gain D)               keep their
What causes HCl to become an acid? A)               the ionic forces B)               covalent exchanges with water C)               the release of H+ D)               the ...
In table salt, _____ bonds hold the ions together. A)               electrovalent B)               electrostatic C)               covalent D)               hydrogen
What happens to sodium when it loses its outer electron? A)               it becomes a negative ion B)               it becomes radioactive C)               it becomes a positive ...
Chemically stable elements will not _____ under ordinary conditions. A)               become radioactive B)               chemically react C)               disintegrate D)     ?...
The only elements that have eight electrons in their outer orbitals and are therefore stable are the _____. A)               metals B)               non-metals C)               ga...
The second electron shell can hold a maximum of _____ electrons. A)               2 B)               4 C)               6 D)               8
Why is iodine-131 used to assess thyroid function? A)               it has a short half-life B)               it becomes absorbed into tissues C)               it is radioactive D...
Which of these can be used to detect heart disease? A)               iodine-131 B)               gallium-67 C)               thallium-201 D)               cobalt-60
Radiation in the form of two protons and two neutrons is the _____. A)               gamma ray B)               electron C)               beta particle D)               alp...
When atoms react chemically they gain, lose, or share _____. A)               protons B)               electrons C)               neutrons D)               atomic weights
What does a radioactive element do? A)               loses neutrons B)               loses protons C)               undergoes nuclear disintegration D)               change...
Two atoms with the same atomic number but different atomic weights are called _____. A)               elements B)               isotopes C)               molecules D)         ...
Which of these has the highest atomic weight? A)               magnesium B)               fluorine C)               lithium D)               sodium
What is the charge of an elemental atom? A)               negative B)               positive C)               neutral D)               constantly changing
The nucleus of an atom always has a(n)                _____ charge. A)               unstable B)               positive C)               negative D)               n...
An electrically charged small negative particle which encircles a nucleus is the _____. A)               proton B)               neutron C)               electron D)         ?...
How many calories of heat energy are required to evaporate 30 grams of water at 100 °C? The initial temperature of the water is 50 °C. The sensible heat of water is 1 cal/g/°C and the latent he...
Which of the following organs will contain villi? A)               esophagus B)               stomach C)               small intestine D)               liver E)        ...
Which of the following statements is NOT correct? A)               Microvilli increase the surface area of the small intestine for absorption of nutrients. B)               Enzymes locat...
The end products of lipid, protein, and carbohydrate digestion enter the blood capillaries of the villi. A)               True B)               False
Where are the brush-border enzymes found? A)               villi B)               microvilli C)               columnar epithelial cells D)               goblet cells E)   ...
Which organ will secrete sodium bicarbonate to neutralize the acidity of chyme in the small intestine? A)               pancreas B)               gallbladder C)               duod...