Practice Exam I Key

Practice Exam I Key - SAMPLE FIRST EXAM -- GENERAL BIOLOGY...

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Unformatted text preview: SAMPLE FIRST EXAM -- GENERAL BIOLOGY 10162 SPRING 2008 I) All of the following are mechanisms of thermoregulation in humans except A) changing the rate of heat luss by vasodilation and vasoconstrictiori. B) changing the rate of evaporative loss of heat. C) relocating to cool areas when too hot or to warm areas when too cold. changing the rate of metabolic heat production. ébchanging the rate of heat exchange by hibernation. 2) Which statement best links the tissues known as connective tissue? A connective tissue will have A) an extracellular matrix containing fibers. B) an epithelial origin. C a supporting material such as chondroitin sulfate. latively few cells and a large amount of extracellular manix- E) both A and B are correct 3) Repolarization of the membrane of a neuron after an action potential is a consequence of which of the following? A) Ca++ gates opening D K+ gates opening B) Na+ gates opening (E) 0th C and D are correct C) Na+ gates inactivating 4) Unlike spermato genesis, oogenesis in humans A is continuous over the life of the woman. D) occurs at a rapid rate. ‘3) . - gins prenatally. E) results in swimming cells. C) produces four haploid gametes. 5) An overdose of which hormone would result in the melting of insects? A) brain hormone ecdysone B)juvenile hormone E.) oxytocin C) prothoracicotropic hormone 6) results in the production of offspring that are genetically identical to their parent and to one another. A) Sexual reproduction (@Asexual reproduction B) Gametogenesis E) Internal fertilization C) Fertilization 7) Which of the following endocrine structt are derived from nervous tissue? A) the thymus and thyroid glands (fine posterior pituitary and the adrenal medulla B) the liver and the pancreas E) the anterior pituitary and the adrenal cortex C) the ovaries and the testes 8) Which example best describes a homeostatic control system? A) The core body temperature of a runner is allowed to gradually rise fom 37C to 450 B) The blood pressure increases in response to an increase in blood volume. C Motility in the digestive tract increases following a meal. .3 e kidneys excrete salt into the urine when dietary salt levels rise. E) A blood cell shrinks when placed in a solution of salt and water. 9) An example of antagonistic hormones controlling homeostasis is A) progestins and estrogens in sexual difi‘erentiation. B) epinephrine and norepinephrine in "ijght-or-flight" responses. C) oxytocin and prolactin in milk production. thyroxine and parathyroid hormone in calcium balance. 'nsulin and glucagon in glucose metabolism. 10) Alpha cells and beta cells can be found in the A) hypothalamus. D) endocrine control center. B pituitary gland. E) liver. pancreas. 11) Which method of contraception o helps prevent the spread of sexually transmitted disease? A) Diaphragm B) Cervical cap Condom D) IUD E) Birth control pill 12). Which of the following is the correct order of the structures through which sperm pass from the time they are produced to ejaculation? A) Vas deferens, seminiferous tubules, epididymis, urethra B) Epididymis, seminiferous tubules, vas deferens, urethra Seminiferous tubules, vas deferens, epididymis, urethra @Seminiferous tubules, epididymis, vas deferens, urethra Vas deferens, urethra, epididymjs, seminiferous tubules they are subject to negative feedback. B) they are not produced by exocrine glands. C) they may be found in the lymphatic system. D) they are present at low concentrations. 13 ; Hormones are able to control homeostasis because E) they are steroids. 14) Cells are to tissues as tissues are to A) membranes. B) organ systems. @ D) organelles. E) organisms. 15) Which of the following endocrine structures is (are) not controlled by a tropic hormone from the anterior pituitary? A) thyroid gland pancreatic islet cells C) testes D) ovaries E) adrenal cortex 16) The hormones secreted by the adrenal cortex are A) inorganic ions. B) proteins. C) polypeptides E) catecholamines. 17) A short blood vessel connects two sets of capillaries lying in which of the following? A) hypothalamus and thalamus B) anterior pituitary and posteriOr pituitary C) posterior pituitary and thyroid gland D) anterior pituitary and adrenal gland ®1ypothalamus and anterior pituitary 18) The hypothalamus controls the anterior pituitary by means of A) second messengers. @eleasing factors. B) antibodies. E) third messengers. C) pyrogens. All of the following statements about endocrine glands are correct except Parathyroids regulate metabolic rate. B) The adrenal medulla produces "fight—or—flight" responses. C) The thyroid participates in blood calcium regulation. D) The pancreas helps to regulate blood sugar concentration. E) The pituitary participates in the regulation of the gonads. 20) Which one of the following receptors is i orrectly paired with its category? A) hair cell - mechanoreceptor ( D tatory receptor - electromagnetic receptor B) rod — photoreceptor E) taste receptor - chemoreceptor C) muscle spindle - mechanorecepto‘r 21) Neurotransmitters are released from presynaptic axon terminals into the synaptic cleft by which of the following mechanisms? A) endocytosis D) osmosis B active transport E) diffusion @xocytosis 22) Injections of which of the following be ones will induce labor in a pregnant woman? A) Estrogen l Oxytocin B) Human chorionic gonadotropin E) Prolactin C) Progesterone 23) Neurons at rest are not at the equilibrium tential for K+ because the cell membrane is A) not permeable to Na+. ( D lightly permeable to Na+ B) not permeable to K+. E) only permeable to K+. C) only permeable to Na+. 24) An eye‘s photorecgptors are located on the A) iris ( B) roomy C) sclera D) cornea E) choroid. 25) At rest, there is a higher concentration of outside the neuron membrane, compared to inside the neuron membrane. A) sulfate B) potassium ions C) amino acids D) phosphate ions 26) In order to taste sucrose, which of the following channel types would have to CLOSE? A) Mg++ B) Na+ e) Ca++ D) 1304— ® 27) The ability of a receptor to absorb the energy of a stimulus is called what? A) amplification 4 D) )receptiOn B) integration E) transmission C) transduction 28) After an action potential, how is the resting potential restored? A) by the opening of sodium activation gates B) by the refractory period in which the membrane is hyperpolarized C by the delay in the action of the sodirnn-potassium pump y the opening of voltage—sensitive potassium channels and the closing of sodium activation gates ) by an increase in the membrane‘s permeability to potassium and chloride ions 29) During an IPSP, the postsynaptic membrane beci u i i more permeable to: A) Ca2+. B) serotonin. C) Na+. E) GABA 30) Hearing is processndpn; ' in which one of the following lobes? A) Antennal (B) Temporal C) Occipital D) Parietal s) Frontal -._—-—...--g— 31) The threshold potential of a membrane A) opens voltage-sensitive gates that result in the rapid outflow of sodium ions. B) is equal to about 35 mV. C) is a graded potential that is proportional to the strength of a stimulus. D is equal to about 70 mV. the depolarization that is needed to generate an action potential. 32) What do muscles, nerves, and glands have in common? A) They are referred to as postsynaptic cells. D) A and B are correct B) They synapse with neurons. ® A, B and C are correct C) They are target cells. 33) Synaptic vesicles discharge their contents at the @mstsynaptic membrane. D) axon hillock. B) dendrite. E) nodes of Ranvier. C) presynaptic membrane. 34) In comparison to females from other mammalian species, the human female A) has fewer reproductive cycles per year. B) reabsorbs the uterine lining following the completion of her uterine cycle. C must copulate in order to ovulatc. @m be continuously sexually receptive. has cycles that are under hormonal control. 3 Which one of the following statements is true regarding temporal summation? @ everal action potentials arrive in fast succession without allowing the postsynaptic cell to return to its resting potential. B) Several postsynapntic cells fire at the same time when neurotransmitters are released from several synaptic terminals simultaneously. C) The voltage spike of the action potential that is initiated is higher than normal. D) The sum of simultaneously arriving neurotransmitters from different presynaptic nerve cells determines whether the postsynaptic cell fires. E) Several lPSPs arrive concurrently, bringing the presynaptic cell closer to its threshold. 36) A goiter is associated with improper functioning of which g1and(s)? A) pancreas B) adrenal C) parathyroids D) ovaries and testes C E) thyroid ) 37) The thermostat of vertebrates is located. in the A thyroid gland. @ hypothalamus C) subcutaneous layer of the skin. D) medulla oblongata. E) liver. 33) Which of the following tis ues lines kidney ducts? A) adipose epithelial B) nervous E) smooth muscle C) connective 39) Which one of the following hormone control sequences is CORRECT? A) GnRH— FSH— LH -— pineal gland (E GnRH — FSH + ovaries C) CRH — LH - testes D) CRH - ACTH -— FSH — thyroid gland E) LH — FSH — adrenal glands 40) Within homeostatic Inec = n 'sms, which one of the following would be an example of an “effector?” A) cone cell “heart muscle cell B) pacinian corpuscle B) calcitonin-producing cell C) pancreas beta cell 41) Hormones from the hypothalamus do NOT affect the release of A thyroid—stimulating hormone D) growth hormone xytocin E) adrenocorticotropic hormone C) prolactin. 42) The major role of most homeos . 'c control systems in animals is to maintain the constancy of fluid A) within cells ound cells B) within the blood vessels E) within body cavities C) within the intestine. Receptor molecules for chemical signals would NOT likely be found 'n the interstitial fluid around target cells D) in the cell membrane of target cells B) in the cytoplasm of target cells E) associated with the DNA of target cells C) in the nucleus of target cells 44). In the early half of the menstrual cycle, before ovulation, which steroid hormone is at its highest level in the blood? @Estrogen D) Progesterone B) Follicle-stimulating hormone E) Testosterone C) Luteinizing hormone 45) Interstitial fluid A) is the internal environment found in animal cells. B) is found inside the small intestine. C is composed of blood. rovides for the exchange of materials between blood and cells. ) forms the extracellular matrix of connective tissue. 46) Which hormone exerts antagonistic action to parathyroid hormone? A) giucagon D growth hormone B) epinephrine alcitonin C) thyroxin 47) Blood samples taken from an individual who had been fasting for 24 hours would have which of the following? A) lowr levels of glucagOn B) high levels of glueagon C) low levels of insulin D high levels of insulin oth B and C would be present. 48) Saltatory conduction is a term applied to conduction of impulses A) from one neuron to another. B along the postsynaptic membrane from dendrite to axon hillock. ong myelinated nerve fibers. D) across electrical synapses. E) in two directions at the same time. ‘ ‘ The axons of rods synapse with bipolar cells. B) ganglion cells. C) cone cells. D) amacrine cells E) lateral cells. 50) Which two pituitary gonadotropins coordinate female reproductive events? A) F ollicle—stimulating hormone and estrogen B) Estrogen and progesterone C) Follicle-stimulating hormone and progesterone D Luteinizing hormone and progesterone Luteinizing hormone and follicle~stimulating hormone ...
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Practice Exam I Key - SAMPLE FIRST EXAM -- GENERAL BIOLOGY...

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