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MTMarathon3 - Test forms |White m A 1 Purple = B 1 Salmon =...

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Unformatted text preview: Test forms: |White m A 1 Purple = B 1 Salmon = C | Yellow = D | .101 MT2 Sp06 - Key Multiple Ch oiee Identifu the letter ofthe choice that best completes the statement or answers the question. Note: True-False order may be reversed, i.e. a. False b. True 1. Statement #1: Compared to the resting membrane potential, during the upstroke of the action potential there is an increase in the number of open Na and Ca channels: -' Statement #2: During the upstroke of the action potential there are more open K channels than there are during the resting membrane potential. Statement #3: The plateau phase is terminated and final repolarization begins with inactivation of some of the open K channels. - . All three statements are true. All three statements are false. Only statement #1 is true. Only statements #1 and #2 are true. Only statements #1 and #3 are true. 09.39:? 2. You observe depolarization during a phase of an action potential. Statement #1: This depolarization could occur because there is either an absolute increase in inward current flow or a decrease in existing outward current flow. .- Statement #2: This depolarization could occur because there an absoltue decrease in inward current flow or an t increase in outward current flow. - a. Only statement #1 is true. b. Dilly statement #2 is true. 0. Both statements are false. 3. Statement #1: Sympathetic stimulation to the pacemaker cells of the SA node increases the slope of the pacemaker potential (diastolic depolarization) andidecreases the threshold for activation of phase 0, the upstroke. f.-:", .--..i Statement #2: Sympathetic stimulation to the pacemaker cells of the SA node increases the slope of the pacemaker potential and decreases the maximum diastolic potential (MDP). _J I. -.j .".j -.\. - .r' Statement #3: Parasympathctic stimulation to the pacemaker cells of the SA node decreases the slope of the pacemaker potential and increases the maximum diastolic potential (MDP) by activating an acetylcholinc K channel. - All the statements are true. All the statements are false. Only statements #1 and #3 are true. Only statements #2 and #3 are true. Only statement #3 is true. a. b. C. d. Name: 4. Contractile energy for ejecting the stroke volume can be increased by Statement #1: an increase in venous return Statment #2: an increase in sarccplasmic Ca produced by an increase in muscle fiber length. Statement #3: an increase in contractility, . a“. All three statements are true. I). Only statements #1 and #3 are true. c. Only statement #1 is true. d. Only statement #3 is true. e. Only statement #2 is true. 5. Condition: The AV node is effectively refractory. a. You would expect activation of the His Bundle and Bundle Branch System and the ventricular muscle. b. You would expect activation of the ventricular muscle but not the His Bundle and Bundle Branch system. i c. You would expect activation of the His Bundle and Bundle Branch system but not the ventricular muscle. d. You would not expect activation of either the His Bundle and Bundle Branch system or the ventricular muscle. 6. Statement #1: Increases in muscle fiber length increase sarcoplasmic calcium in both cardiac and skeletal muscle. 3 » ._,’ 'v" “_m_\‘=»__~i‘.-'si.-a Statement #2: Increases in sacroplasmic calcium increase the number of actin-myosin crossbridges mobilized in J cardiac muscle. /\ . Statement #3: Increases in sarccpfilasmic calcium do not change in the number of actin-inyosin cross-bridges in i i skeletal muscle. " w._ M“ 1— All three statements are true. All three statements are false. Only the first statement is true. Only statements #1 and #2 are true. Only statements #2 and #3 are true. romance IJ/Name: __.,.._J—~ 7. ti Which of the ECG tracings below show onls a decrease in heart rate from control? .l \ Control fl. ‘1 l" A ,. If 2 v! 5/ a U" '. ‘ 'v A fl. ‘1' It'llll'i F ” v" 'V J 'l/ “ \ff \ A B ”l fl {1 \/ 1/ l'tx _ O - \ ., ""“\ ' 1. Trace A Trace B Both traces A & B Neither trace A nor B. 9-"? 9" P’ 8. Which of the following will decrease capillary filtration? Statement #1: A decrease in capillary oncotic (protein osmotic) presswe. Statement #2: An increase in interstitial fluid pressure. Statement #3: a decrease in the number of open capillaries (there is no change in arterial blood pressure). All three statements will true. All three statements are false. Only statement #1 is two. Only statements #2 and #3 are true. Only statement #3 is true. .0 9'99“?" Name: 9. 10. Condition: There is an increase in both sympathetic activity to the arterioles in skeletal muscle and an increase in skeletal muscle metabolism. Statement: You will obsene a decrease in arteriolar resistance and an increase in blood flow to the skeletal muscle. a. The statement is true b. The statement is false. 0. You cannot determine if there is an increase in blood flow because you need to know the level of sympathetic activity and the level of metabolism Which point on the graph below represents an increase in eonttactility with no change in stroke volume from control? (//# / Control Stroke Volume 0: Control End DIEStOlIC Volume Cardiac Function Curves. 101.06 a 2 b 3 c 4 d 5 e 9 b. \1 11. Use the concepts relating elegrical to mechanical activity of the heart and blood flow through the heart. Question: Which of the following statements listing the sequence of events in the cardiac cycle is consistent with these concep ? (Note. somejsteps in $5,553 uence may be (matted) aj QRS c0 plex, closure eF‘flie AVyalyes, onset of ventricular o ntraction, increase ventricular'pressure, flow of blood‘into the aorta, opening of t e aortic valve QRS complex, onset of ventricular contraction, closure of the AV valves, increase ventric ar pressure, floysfiof blood into the aorta, opening the aortic valve. QRS c pl closure MhC'AV*Vfid:V§S, onset of isovolur ic contraction, onset of ventricular Qtraction, opening of theDaortic valve, flow of blood into the aorta. more than one of the sequences is correct. none of the sequences is correct. 12.; Condition: There is a fall in blood pressure. The reflex compensation to return blood pressure to normal Statement #1: includes an increase in arterial volume. All three statements are true. "'F All three statements are false. Only statement #1 is true. Only statements #1 and #2 are true. nly statements #1 and #3 are true. Statement: Both at FRC and at the end of inspiration the transmural pressure for the lung is equal in magntiude and opposite in direct to the intrinisc forces of the lung, and the transmuraLptessgrejor the chest wall is equal in magnitude and opposite in direction to the intrinsic forces for the chest wall. am a._. b. Statement is true. Statement is false. IE Condition: At F RC the intrinsic elastic recoil/surface tension forces for the lung are 2 inward. At F RC the | , . . . mtnnsrc elastic forces for the chest wall are 2 outward. Question: What is the pleural pressure at PRC for this respiratory system? a. +4 'b'. -4 a. +2 {1. -2 6. None of the above. ' “-1-, 5 Name: 15/, Initial conditions. The airways in the lung are open to outside air. The ER/ST forces for the lung are 5 inward The pleural pressure is +3. Question: As a consequence of these initial conditions: you will observe a. Inspiration b. Expiration c. No change in lung volume . ’ I l—u-em'l for the lung Statement #1: Inspiration will continue until the ER/ST forces of the lung equal the increased transmural pressure Statement #2: Passive (unforced) expiration will continue until the ERfST forces of the lung are equal in magntiude and opposite in direction to the intrinsic forces of the chest wall. *1- a'. Both statements are true . 5. Both statements are false. ‘ c. Only the first statement is true. (1. Only the 2nd statement is true. 1 17. Statement: In the absence of an PRC: alveolar and pulmonary venous P02 will increase with inspiration and decrease with expiration. a, Statement is true. b. Statement is false. +1" 18, Statement. Surfactant reduces the intrinsic elastic forces for the lung decreasing the change in transmural pressure W’ _ needed for inspiration '21: The statement is true. bi The statement is false. mendition: There is a decrease in lung ventilation. There is no change in metabolism As a consequence you would predict - l i Statement set #1: a decrease in alveolar P02 and an increase in alveolar Pco2. Pulmonary venous P02 and Pco2 will eqflhbflflWflW. Statement set #2: a decrease in alveolar P02 with nee/hangs in alveolar Pc02. Pulmonary venous P02 and P002 will e nilibr wth the alveolar P02 and Pco2. Statement set #3: a decreae in alveolar P02 and an increase in alveoarl P002. Pulmonary venous P02 and P002 will not equilibrate with alveolar” P92. and. P002 3. Only statement Sci #l is true. B. Only statement set #2 is true. c. Only statement set #3 is true. d None of the statement sets is true. Condition: Systemic arterial P02 is 100 Torr and systemic arterial PceZ‘Iis-Ml iférr, the normal values for both. Statement: The content of oxygen/’1 00 ml of blood is greater than that for carbon dioxide. a. The statement is true. b. The statement is false. Condition: You have a unknown liquid. You do not know the properties of this liquid. You measure the partial pressures of oxygen and carbon dioxide in this liquid. You observe that the partial pressure of carbon dioxide is 2 times that of oxygen. Statement: You can conclude that content of oxygen in this liquid is greater than that of carbon dioxide. a. The statement is true. b.- The statement is false. Recall the oxyhemoglobin dissociation curve. Observation: There is a smaller decrease in the partial pressure of oxygen with decreases in oxygen content from 14 ml oxygen/100 ml ofblood to 12 ml of oxygeni’IOO m1 of blood than there is from 20 ml oxygen/100 ml of blood to 18 ml of oxygenflOO m1 of blood. Statement: The smaller decrease in partial pressure is a consequence of less oxygen leaving the blood. a. The statement is true. I). " The statement is false. Name: 23. Use this graph for this question: ”Excretion Rate mgt‘min Plasma Concentration mg/ml Statement #1: Graph A indicates filtration, Graph B indicates secretion and Graph C indiCates reabsorption. _ i Statement #2: Graph A indicates reabsorption= Graph B indicates filtration and Graphs C indicates secretion. Statement #3: Graph A indicates secretion. Graph B indicates filtration and Graph C indicates reabscrpticn. a. Statement #1 is correct. b Statement #2 is correct. 0. Statement #3 is correct. d None of the statments is correct. 24. Statement: For a'substance that is reabsorbed2 excretion into the urine will not occur until the filtered load (plasma concentration x GFR) exceeds the transport capacity of the nephrons. a. The statement is true I‘ b. The statement is false. Statement: Increasing efferent arteriolar resistance without changing afferent arteriolar resistance will increase GFR and decrease vasa recta blood flow. a. Statement is true. I). Statcnientis false. :1 27. 28. K 'Wfilocking the Na/K ATP pump on the basolateral membrane of proximal tubules epithelial cells will “gm—o— Statement #1: decrease the reabsorption of Na from the proximal tubular fluid. Statement #2: decrease the reabsorption of glucose, amino acids and other solutes cotransported with Na. Statement #3: decrease the secretion of H+ into the proximal tubule Only statement #1 is true. Only statement #2 is true Only statements #1 and #2 are true. All three statements are true, All three statements are false. 9 411.9 9" 5-“ Statement #1: Most of the glomerular filtrate is reabsorbed m the proximal tubule. Statement #2: In a healthy individual, all filtered glucose and amino acids are reabsorbed in the proximal tubule: Statement #3. While Na uses membrane transporters for reabsorplion, Na does not have a transport maximum because it is also reabsorbed by the solvent drag All three statements are true. All three statements are false. Only statements #1 and #2 are true. Only statement #l is true. Only statement #2 is true, QED-.0 579. Under conditions where there is a reduced Circulating blood volume, Statement #1: there is an increase in GFR. Statement #2: there is stimulation of ADH secretion from the posterior pituitan- through disinhibition [reduction of inhibition) from a decrease in afferent input from the mammals. leftatriimi andu pu lmonary veins. ’7 V—h—h ——_~___‘__ Statement #3: there is an increase in aldosterone secretion from the adrenal cortex which increases Na transporters in the Loops of Henle, distal tubules and collecting ducts increasing water reabsorption. a All three statements are true. b. All three statements are false. c. Only statements #2 and #3 are true. (1. Only statement #3 is true. c. Only statements #1 and #3 are true. ‘2 /,..H_n.- Statement: Both ADH and aldosterone are secreted with mcreases in osmelfifil} of theblood a. Statement is truer“ b. Statement is false. ' , Da m n ha msters Name: 30 Statement #1: The 0 -through capillary L I‘ ounterCui'rent flow through the v asa recta reduces; compared to a flow — -' sx; stem the rate of \Vas11ou'toffi1'e medullan osmotic gradient. Statement #2: Under conditions where water is conserved, i.e. reduced water excretion, the rate of blood flow through the vasa recta is increased. 3. Both statements are true. b. Both statements are false. . ' Only statement #1 is true. d. Only statement #2 is true. 10 ID: A 101 MTZ Sp06 - Key Answer Section MULTIPLE CHOICE D 1J~+1~Mwe :J‘\ 7. 3. 9. 10. '11. 12. 3‘. 13. 14. IE I; A E A D A D D A C E D A D 15. B 16. A -:' 17. A *1 i 13. A 19. A 20. B 21. B 22. B 23. C 24. A 25. A 26. D 27. A 23. A 29. B 30. c ...
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