bio188_test 3 questions + answers (how well do you really know them)

Bio188_test 3 questions + answers (how well do you really know them)

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Unformatted text preview: Sheet1 Blood is which type of tissue: A) connective B) epithelial C) matrix D) muscle E) nervous,"A) connective" Which of the following IS NOT a neurotransmitter: A) acetylcholine B) phenylalanine C) dopamine D) serotonin E) histamine,"B The action potential: A) begins with the membrane's increased permeability to potassium B) returns to resting when the sodiu What generallys maintains the electric charge gradient across the neuronal membrane: A) sodium-potassium pump B) action Saltatory conduction results when: A) continuous propagation of nerve impulses speeds up. B) a nerve impules jumps from on Ion channels: A) are proteins that mediate ion transport B) may exist in both an open and closed state C) are present only in n Trophic hormones: A) are produced by the cerebral cortex B) are produced by the anterior pituitary gland C) are produced by Which of the follo0wing is an energy-dependent transport process in cells: A) diffusion B) facilitated diffusion C) osmosis D) ac If the thickness of a permeable membrane increases 50% the net flow of molecules across the membrane: A) increases 50% Which of the following IS NOT an example of negative feedback: A) increase in blood glucose stimulates insulin secretion B) a The action potential: A) travels along all axons at the same speed B) is slowed down if a nerve cell has myelin around it C) is In nerve cells, which of the following carry electric charges across the cell membrane: A) electrons B) protons C) water D) ions A target tissue in the endocrine system is defined as: A) the tissue with the greatest amount of hormone flowing through it at a What is the effect of inhibiting acetylcholinesterase: A) release of neurotransmitter from the presynaptic membrane is inhibited Apical surfaces of apithelial cells face the lumen of the body cavity: A) True B) False,"A) True" Stimulation of the parasympathetic division results in: A) fight or flight response B) increased heart rate and blood pressure C) Which of the following is a steroid hormone: A) insulin B) glucagon C) epinephrine D) norepinephrine E) cortisol,"E) cortisol" Which of the following is incorrect about the endocrine system: A) the hypothalamus is a link between the endocrine and nerv Following depolarization, the neural membrane potential is restored when: A)Na+ ions rush outward through the membrane B Transporting substances across a membrane from an area of lower concentration to higher requires: A) phospholipids B) diffu Endocrine glands are: A) richly vascularized B) ductless C) secrete hormones in low concentrations D) all the above E) B and 2/3 of Toms body weight is water, his blood plasma volume is 3.2L. What is Toms approx. body weight: A) 24kg B) 72kg C) 48 The extracellular fluid compartment includes: A) intracellular fluid, blood plasma, interstitial fluid B) blood plasma, intracellular Homeostasis refers to the tendency to keep the internal environment of cells and tissues: A) matched to the external environm In the resting nerve cell, K+ concentrations are higher on the inside of the membrane: A) True B) False,"A) True" The neuronal cell membrane resting potential is about: A) -50mV B) +50mV C) -500mV D) +500mV E) -5mV,"A) -50mV" The sympathetic nervous system: A) is part of the voluntary nervous system B) relays information form the body to the brain C The thyroid and parathyroid glands produce and secrete mineralocoticoid hormones: A) True B) False,"B) False" Insufficient levels of _____ result in diabetes mellitus type 1: A) epinephrine B) glucagon C) insulin D) somatostatin E) cortisol Vasopressin and oxytocin are made by the: A) anterior pituitary B) kidney C) uterus D) posterior pituitary E) hypothalamus,"E) Action potentials are generated in the dendrites of neurons: A) True B) False,"B) False" Atropine dilates the pupil of the eye by inhibiting the parasympathetic nervous system: A) True B) False,"A) True" Axon repolarization is due to: A) closure of Na+ ion channels and delayed opening of K+ ion channels B) closure of K+ ion ch What determines the simple diffusion rate at which carbon dioxide leaves the metabolically active cell: A) the concentration of Insulin increases: A) the uptake of glucose by target tissues B) protein degradation C) lipid degradation D) breakdown of glyco The signals that bind to receptors of the same cell that made them are knows as: A) paracrine signals B) parasitic signals C) a Receptors for water soluble hormones are: A) on the cell surface B) in the Golgi apparatus C) in the cell nucleus D) in the roug Which of the following is a mechanism to terminate neurotransmitter action: A) release of Na+ into synaptic space B) osmosis Which hormone is produced by the adrenal medulla: A) insulin B) adrenocorticoptropic hormone C) epinephrine D) thyroxine E Nerve cells communicate with other nerve cells by means of: A) electric signals that pass across synapses B) chemical signal 2M glucose solution has twice the osmotic pressure as 1M NaCl A) True B) False,"B) False" Diffusional equilibrium occurs when: A) the area of exchange surface becomes infinitely large B) the exchange surface becom Active transport usually moves molecules: A) in the same direction in which diffusion moves them B) in the opposite direction Afferent information flows _______ the CNS, the efferent information flows ________ the CNS: A) to;to B) to;from C) from;to D Oligodendrocytes make myelin in the peripheral nervous system: A) True B) False,"B) False" Which of the following is NOT a general tissue type found in humans: A) connective tissue B) epithelial tissue C) muscle tissu The parathyroid glands are involved in regulating blood levels of: A) calcium B) glucose C) iodine D) sodium E) thyroxine,"A) c In physiological control systems, the phenomenon of negative feedback: A) is the least common type of feedback mechanism Interstitial fluid separates intracellular fluid from the blood plasma: A) True B) False,"A) True" When an action potential arrives at the axon terminal, the voltage gated calcium channels there: A) release calcium into the sy Page 1 Sheet1 ) epithelial C) matrix D) muscle E) nervous,"A) connective" itter: A) acetylcholine B) phenylalanine C) dopamine D) serotonin E) histamine,"B) phenylalanine" brane's increased permeability to potassium B) returns to resting when the sodium channels are open C) can be triggered in very rapids su e gradient across the neuronal membrane: A) sodium-potassium pump B) action potential C) Resting Potential D) voltage-gated channels ous propagation of nerve impulses speeds up. B) a nerve impules jumps from one neuron to another C) the threshold for an action potent n transport B) may exist in both an open and closed state C) are present only in nerve cells D) play no role in establishing the resting mem erebral cortex B) are produced by the anterior pituitary gland C) are produced by the posterior pituitary gland D) are produced by the hypot ent transport process in cells: A) diffusion B) facilitated diffusion C) osmosis D) active transport E) passive transport,"D) active transport" creases 50% the net flow of molecules across the membrane: A) increases 50% B) decreases 50% C) increases 66% D) decreases 66% E f negative feedback: A) increase in blood glucose stimulates insulin secretion B) a drug user increases use to sustain a "high" C) a decreas s at the same speed B) is slowed down if a nerve cell has myelin around it C) is blocked at the nodes of Ranvier D) causes a brief depolar ctric charges across the cell membrane: A) electrons B) protons C) water D) ions E) proteins,"D) ions" fined as: A) the tissue with the greatest amount of hormone flowing through it at any time B) the tissue closest to the endocrine gland produ terase: A) release of neurotransmitter from the presynaptic membrane is inhibited B) synthesis of neurotransmitter in cells is inhibited C)bre en of the body cavity: A) True B) False,"A) True" sults in: A) fight or flight response B) increased heart rate and blood pressure C)increased digestive activities and decreased heart rate D A) insulin B) glucagon C) epinephrine D) norepinephrine E) cortisol,"E) cortisol" endocrine system: A) the hypothalamus is a link between the endocrine and nervous system B)trophic hormones are important in negative ne potential is restored when: A)Na+ ions rush outward through the membrane B)K+ ions rush outward through the membrane C)Cl- ions r from an area of lower concentration to higher requires: A) phospholipids B) diffusion C) gap junctions D) facilitated diffusion E) energy,"E B) ductless C) secrete hormones in low concentrations D) all the above E) B and C only,"D) all the above" lasma volume is 3.2L. What is Toms approx. body weight: A) 24kg B) 72kg C) 48kg D) 84 kg E) no enough information given,"B) 72kg" A) intracellular fluid, blood plasma, interstitial fluid B) blood plasma, intracellular fluid C) interstitial fluid, blood plasma D) intracellular fluid, the internal environment of cells and tissues: A) matched to the external environment B)at diffusional equilibrium over time C) at a steady s re higher on the inside of the membrane: A) True B) False,"A) True" l is about: A) -50mV B) +50mV C) -500mV D) +500mV E) -5mV,"A) -50mV" f the voluntary nervous system B) relays information form the body to the brain C) is part of the afferent nervous system D) is part of the a and secrete mineralocoticoid hormones: A) True B) False,"B) False" mellitus type 1: A) epinephrine B) glucagon C) insulin D) somatostatin E) cortisol,"C) insulin" ) anterior pituitary B) kidney C) uterus D) posterior pituitary E) hypothalamus,"E) hypothalamus" tes of neurons: A) True B) False,"B) False" ting the parasympathetic nervous system: A) True B) False,"A) True" a+ ion channels and delayed opening of K+ ion channels B) closure of K+ ion channels and delayed opening of Na+ ion channels C) closu which carbon dioxide leaves the metabolically active cell: A) the concentration of carbon dioxide on each side of the membrane B) the amo y target tissues B) protein degradation C) lipid degradation D) breakdown of glycogen in the liver E) All the above,"A) the uptake of glucose e cell that made them are knows as: A) paracrine signals B) parasitic signals C) autocrine signals D) hormones E) responders,"C) autocrin ) on the cell surface B) in the Golgi apparatus C) in the cell nucleus D) in the rough endoplasmic reticulum E) in the smooth endoplasmic r inate neurotransmitter action: A) release of Na+ into synaptic space B) osmosis of neurotransmitter out of synaptic cleft C) enzymatic des edulla: A) insulin B) adrenocorticoptropic hormone C) epinephrine D) thyroxine E) cortisol,"C) epinephrine" lls by means of: A) electric signals that pass across synapses B) chemical signals that pass across synapses C) bursts of pressure that "b essure as 1M NaCl A) True B) False,"B) False" rea of exchange surface becomes infinitely large B) the exchange surface becomes infinitely thick C) concentration gradient goes to zero D in the same direction in which diffusion moves them B) in the opposite direction in which diffusion moves them C) in the direction that tend from" ral nervous system: A) True B) False,"B) False" e type found in humans: A) connective tissue B) epithelial tissue C) muscle tissue D) nervous tissue E) sensory tissue,"E) sensory tissue" ting blood levels of: A) calcium B) glucose C) iodine D) sodium E) thyroxine,"A) calcium" return to set point" m the blood plasma: A) True B) False,"A) True" terminal, the voltage gated calcium channels there: A) release calcium into the synaptic cleft B) actively transport neurotransmitter into the Page 2 ...
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