NPB101-F-Fa07-Clean

NPB101-F-Fa07-Clean - x, " '\ mas: Date: Class:...

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Unformatted text preview: x, " '\ mas: Date: Class: Test Form: B NPB 101 Final Fall 2007 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. What is the primary purpose of myelination? a. it speeds up synaptic transmission b. it speeds action potential propagation c. It prevents heat loss from neurons d- It provides protection from mechanical shock A drug company designed a compound, when applied to visceral tissue like the heart, strongly elicits the sameresponse as sympathetic stimulation. This compound induces its effects by... mimicking acetylcholine mimicking norepinephrine antagonizing glycine receptors mimicking glutamate _ antagonizing dopamine receptors sees.» Statement #1: FSH stimulates the synthesis and secretion of estrogen by the ovarian follicles. - Statement #2: During the follicular phase, estrogen levels are increasing while FSH levels are decreasing. ' Statement #3: Estrogen has an autocrine affect on the ovarian follicle, stimulating the synthesis of FSH receptors in the ovarian follicles. All three Statements are true. All three Statements are false. Only Statements #1 and #3 are true, Only Statements #1 and #2 are true. Only Statements #2 and #3 are true- case‘s Which of the following is a NOT a function associated with the nervous system? a Transduce chemical stimuli b. Control the strength of muscle contraction c. Homeostatically regulate blood pressure d Regulate renal water absorption e ALL of the above ARE functions associated with the nervous system Test Form: B 5. Pick the TRUE statement about homeostasis a. The responses are voluntarily controlled . All body activities contribute to homeostasis c. The concentrations of all molecules in the blood are homeostatically regulated d. Homeostatic responses are reflexes 6. The 1A afferent of a muscle spindle responds best to changes in... muscle fiber length muscle contraction speed __muscle contraction strength muscle intracellular Ca2+ muscle fiber membrane potential 9999‘.” 7. What event occurs in photoreceptors in response to light? Depolarization Destruction of photopigments Neurotransmitter release by the photoreceptor G-protein activation ' Ca2+ efflux 99957?” 8. Consider a normal whole skeletal muscle. As a result of moderate exercise, one would expect... - 3. increased interstitial fluid P002 and [H+]. b. an increase in muscle blood flow caused largely by metabolic vasodilators. Pronounced vasoconstriction of precapillary sphincters in the muscle. d. all of the above e. a and b 5" 9. Statement #1: Normal growth requires T3 (triiodothyronine), insulin and growth hormone. _ Statement #2: As statedin lecture, a diet high in carbohydrate but low in protein will not produce optimal growth because there is insufficient somatomedin as a consequence of low growth hormone. Both Statements are true. Both Statements are false. Only the first Statement is true. Only the second Statement is true. 999‘!” Test Form: B __ 10. During the cardiac cycle, the period of time immediately following the first heart sound but prior to the second heart sound is characterized by? The period of rapid ventricular filling. Isovclumetric ventricular contraction. . The period of rapid ejection of the ventricular stroke volume. None of the above b and c sees“? 11. The basic process of recording the EKG (electrocardiogram) was discovered by? Einthoven Ravier Nernst Bautista (and is called the Bautista Effect). Goldberg (and is called the Goldberg Variation). 9:19:75» 12. The pulmonary circulation is characterized by... a. high alveolar -— capillary membrane surface area to support diffusive gas exchange. b high blood pressure c. low total pulmonary blood flow relative to cardiac output. d. All of the above - 6 None of the above 13. Consider the kidney. Inhibition of active Na+ reabsorption in the nephron would result in decreased renal water reabsorption. a. True b. False 14. Consider the normal generic systemic capillary. One would expect... a. High permeability of the capillary to H20. _ b. The capillary to be relatively impermeable to plasma proteins. c. A high degree of direct sympathetic nervous control of capillary vascular resistance. d. None of the above e. a and b | Test Form: B 15. Inhibition of active Na+ (Cl) reabsorption in the Loop of Henle would... a. result in the excretion of concentrated urine. b. decrease the ability of the kidney to form concentrated urine. 0. decrease the ability of the kidney to reabsorb H2O from the Collecting Ducts. d. all of the above 6. bandc 16. Which of the following hormones will stimulate lipolysis of stored triglycerides producing an increase in fatty acids in the blood? Only growth hormone and cortisol. Only glucagon Glucagon, cortisol and growth hormone. Only glucagon and cortisol. insulin, cortisol and growth hormone. PP“??? 17. What type of CNS cell is responsible for carrying information from the spinal cord to an effector organ (9.9. the heart)? An astrocyte Oligodendrocytes Efferent neurons Afferent neurons lntemeurons 99.0.3!“ 18. Administration of an aiti-cholinergic drug Would... impair the ability of the stomach to secrete gastric juice. decrease gastric motility. - abolish the gastric B.E.R. all of the above a and b SPF-9.0“? 19. The force of contraction in both skeletal muscle and cardiac muscle can be increased by temporal summation. a. True b. False 21. 22. 23. erasure Test Form: B . Statement #1: Prior to the development of the fetal adrenal giand (before the second trimester of pregnancy) , the source of maternal estrogen is the corpus luteum of pregnancy. Statement #2: With development of the fetal adrenal gland and the synthesis and secretion of DHEA , the placenta becomes the source of maternal estrogen. Both Statements are true. Both Statements are false. Only the first Statement is true. Only the second Statement is true. At the end of normal expiration when outward air flow has ceased... a. The lung is at FRC (functional residual capacity). _ b- The elastic recoil tendency of the lung is balanced by negative ‘ 'intrathoracic pressure. 0. Lung volume is maximal. ct. a and b 6:. none of the above Statement #1: in the male, FSH stimulates spermatogenesis and the synthesis of androgen binding protein by the Sertolic Cells. Statement #2: in the male, LH stimulates the synthesis and secretion of testosterone. a. Both Statements are true. b. Both Statements are false. c. Only the first Statement is true. d. Only the second Statement is true. Which hormone or hormones stimulate/s the conversion of amino acids to glucose? Glucagon Cortisol Both giucagon and cortisol. Neither glucagon nor cortisol. ' moons: Test Form: B . When responding to a iong-iastingstimulus, a slow adapting receptor neuron... Slowly depolarizes to threshold before firing an AP Fires APs continuously while the stimulus is applied Decreases the height of APs while the stimulus is applied initially fires APs, then stops firing, and finally tires APs again when the stimulus ceases eeee . Which of the following statements about thermoregulation is/are correct? a. in a cold environment the body will lose heat. by conduction, convection, radiation, and evaporation. ‘ b. in a hot environment when the ambient temperature exceeds that of the skin surface, evaporation is the only means for the body to lose heat. c. The temperature control centers in the adrenal gland receive afferent input from peripheral thermoreceptors in the skin and central thermoreceptors in the hypothalamus and internal organs. d. all of the above 8- a and b 26. Which of the following is n_ot a normal function of hemoglobin? Reversible binding of 02 CO2 transport chemical buffering oi H+ contribution to the level of plasma Colloid Osmotic Pressure none of the above, i.e. all are functions of hemoglobin eases 27. There is a decrease in blood glucose levels. Which of the following hormone(s) can contribute to return blood glucose to normal? 21. insulin and glucagon b. insulin and cortisol c. Cortisol and glucagon d. Only glucogon e. Only insulin 28. in a cell at rest... a. The Nati'Kt pump moves three Na into the cell, and two K+ out. b. The membrane potential is best predicted by the Nernst equation c. The membrane potential is —80 Volts. d. EReS, is primarily determined by K+ ettlux Test Form: B 29. Pick the FALSE statement about mc‘ilor control. 31. 32. l” The spinal cord may regulate motor reflexes - The supplementary motor cortex helps plan to do a sequence of voluntary motor movements - Skeletal motor contraction is always voluntarily controlled _ The cerebellum is involved in modulating skeletal motor movements Increased intracellular Ca++ (ionic calcium) concentration... a. b. is essential to excitation—contraction coupling. i-n-skeletal and cardiac muscle. ' is essential to the ability” of the Sympathetic Nervous System to cause positive inotropism in cardiac muscle. is essential to the function of the Sino—Atrial Node as the cardiac pacemaker. all of the above a and 0 Inhibition of which of the following would markedly decrease distal tubular Na+ reabsorption? - An increase in the force of contraction of a skeletal muscle produced by an increase in the a b. c. d e Renin secretion. Aldosterone secretion. Distal tubular Na+/'K+ exchange. all of the above a and is number of motor units contracting simultaneously is called... EVE-PETE” temporal summation. Positive inotropism ' tetanus. Spatial summation, recruitment, or multiple motor unit summation. None of the above Test Form: B . Sympathetic postganglionic nerves innervating vascular smooth muscle produce vasoconstriction by releasing which of the following at the effector site? a Acetylcholine (Ach) b Epinenphrine c. Angiotensin ll (1 None of the above ' e a and b 34. Where in a neuron do graded potentials sum and elicit an action potential? 3. Axon terminal b. Dendrites c. Axon hillock (1. Node of Ranvier 35. You consume aa normal meal. You would expect to observe an increase in both insulin and glucagon. an increase in both insulin and cortisol. an increase in glucagon. an increase in cortisol. an increase in insulin. 9999‘?” 36. You’re teaching your roommate about synapses. One fact you tell him is that... Binding of neurotransmitter always causes an lPSP Presynaptic cells are capable of reuptaking neurotransmitters Ca2+ is released by the presynaptic cell IPSPs can be induced by K+ influx TWO of the above should be told to the roommate sense 37. in a myocardial cell excitation of the cell membrane associated with activation is... characterized as Phase Zero of the action potential. caused by the rapid influx of K+. caused by the opening of Na+ channels in the myofiber‘s cell membrane. a and c none of the above a. b. c. d. c. Test Form: B . A central nervous system region that controls speech generation is... The somatose nsory cortex The dorsai root gangia Wernicke’s area ' The thalamus The brain stem 9999‘? 39. The primary regulator of ventilation under normal circumstances is... a. the P02 of systemic venous blood monitored-by central chemoreceptors. b. the P02 of Systemic arterial blood monitored by peripheral Chemoreceptors. c. the systemic arterial P002. d. the CO2 concentration of pulmonary arterial blood. 6. none of the above . 40. Which of the following stimuli are transduced by hair cells? a. Musical sounds b. Rotational acceleration of the body c. Visual input d Taste _ 6 TWO of the above are CORRECT answers to this question. 41. Systemic vascular resistance is a mainly a function of Sympathetic Nervous activity. b. uninfiuenced by circulating hormones. c. largely controlled by the physiologic regulation of arteriolar radius. d All of the above 6 a and c 42. What can elicit an action potential in a neuron that is in its absolute refractory period? a. A receptor potential b. A stronger than normal stimulus c. A weaker than normal stimulus d. Nothing can elicit an AP during this period Test Form: B fl 43. Pick the TRUE statement about graded potentials in postsynaptic neurons. 3. When the potential arises from simultaneous input from several presynaptic inputs, the process is called temporal summation . Graded potentials are always excitatory c. Graded potentials always elicit action potentials d. Hyperpolarizing potentials are classified as lPSPs 44. Under normal conditions, one would expect tripling (3x) the rate of ventilation... to triple the 02 content of arterial blood. , to triple the 02 saturation of hemoglobin in arterial blood. to decrease the P602 of arterial blood. all of the above - a and b 9999‘!” 45. Consider a situation in a typical capillary in which permeability is normal, Pcap = 25 mmHg, " ‘ PM = 5 mmHg, COPcap = 25 mmHg, and COPint = 10 mmHg. One would expect... a, net'transcapillary filtration. b. net transcapillary reabsorption. 46. The site in the kidney characterized by Glomerulo-Tubuiar Balance is? the Loop of Henle the Distal Tubuie the Collecting duct the Proximal Tubule the Renal Medulla sue-9275» 47. Which of the following is/are Gastro—lntestintinal Hormones? a. Cholycystokinin (CCK) b. Secretin c. ,Enteric Gastrin d. All of the above 6. none of the above Test Form: B 48. Trogonin is a protein important in a. - Excitation ~— contraction in skeletal muscle myotibers. b. Promoting blood clotting. c. Stimulating the adrenal release of Aldosterone. d all of the above 6 a and b 49. Erthyropoiesis... a. Occurs in the bone marrow upon stimulation by Erthyropoietin. b. Occurs in the kidneys in response to reduced oxygen delivery to the kidneys. Refers to an increase in the circulating number of leukocytes. Refers to the destruction of red blood cells in the spieen. c. None of the above. _ Fl"? ' t 50. Transecting the pituitary stalk, which connects the hypothalamus to the pituitary gland, would be expected to affect secretion of Both the anterior and posterior pituitary hormones Only the anterior pituitary hormones Ony the posterior pituitary hormones Neither the anterior or posterior pituitary hormones i193?!” 51. Condition: The genotype is XY. The SFtY region on the Y chromosome is non-functioning. You would expect to observe a. ovaries but no testes. Absence or both m_ale and female internal reproductive structures. b. neither testes nor ovaries. Absence of both male and female internal reproductive structures. c. testes but no ovaries. Differentiation of the male internal reproductive structures. d. ovaries but no testes. Differentiation of female internal reproductive structures. 52. Which statement about somatic senses is FALSE? a. We can consciously perceive some somatic senses b. They can be involved in our conscious perception of plasma P002 c. The somatosensory cortex may process the information :1. Detection of a cold object to the skin is an example 11 i 54. 55. 56. 57. meow» 6. As a consequence of increased (3 FR, one would expect proximal tubular reabsorption of . Pick the TRUE statement All reflexes are not consciously perceived In a reflex. loop, the brain or spinal cord is the effector organ All reflexes are autonomic The size of a reflexive response is often proportional to the stimulus ' ' strength Pain withdrawal reflexes cannot be overridden filtrate to... a. increase - b. decrease C. As a result of an increase in mean systemic arterial blood pressure, one would expect which of the following compensatory responses... a. @P‘Po‘ Consider the cardiac cycle. Which of the following is/are associated with ventricular remain unchanged a decrease in the frequency of carotid sinus baroreceptor action potential generation. decreased heart rate. decreased sympathetic nervous activity. b and 0 none of the above diastole? Considering the hollow organs of the Gastro-lntestinal system, one would expect stimulation of the Parasympathetic Nervous System to... 9999‘s roe-99's ejection of the stroke volume isovolumetric relaxation rapid ventricular filling all of the above b and c decrease Gastrin secretion from the stomach. decrease gastric juice secretion. decrease intestinal motility. none of the above a and c 12 Test Form: B rage-3'- Test Form: B . Statement #1: Angiotensin it stimulates aidosterone secretion from the adrenal cortex. Statement #2: ACTH is required for Aldosterone synthesis by'the adrenal cortex. a. Both Statements are true. is. Both Statements are false. c. Only the first Statement is true. _ d. Only the second Statement is true. Consider a situation in which extracellular fluid volume (ECFV) has markedly decreased from its normal level. in compensation one would expect? An increase in the circulating level of Angiotensin ll. An increase in ADH secretion from the Posterior Pituitary. Increased renal Na+ and H20 reabsorption. all of the above a and b 9999‘.” Which of the following Statements is/are correct in describing endocrine control of plasma calcium? Statement #1: Active Vitamin D, independent of parathyroid hormone, can maintain normal plasma calcium-levels by stimulating B’d‘ne dismantling, regulating both intestinal absorption and renal reabsorption of calcium. Statement #2: Both parathyroid hormone and active vitamin D increase plasma calcium by stimulating osteoclasts to synthesize and secrete RANKL (receptor activator NF-ch ligand). Statement #3: RANKL stimulates the differentiation of macrophages into osteoclasts and increases osteoclast activity. All three Statements are true. - All three Statements are false. Only Statements #2 and #3 are true. Only Statement #3. is true. Only Statement #1 is true. 9999‘?” 13 ...
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NPB101-F-Fa07-Clean - x, " '\ mas: Date: Class:...

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