BIO 669 QUIZ 2 LATEST 2025 ACTUAL TEST COMPLETE 50 REAL QUESTIONS AND CORRECT VERIFIED ANSWERS (A NEW UPDATED VERSION)

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BIO 669 EXAM 3 (NEW 2024/ 2025 B B B BB B B B




UPDATE) QUESTIONS & VERIFIED ANSW B B B B




ERS| GRADE A| 100% CORRECT- B B B B




The key regulator determining if a muscle, such as cardiac muscle, contract
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s or not is the presence of:
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A. Ca++ b




B. ATP b




C. K+ b




D. Epinephrine - ANS ✓A. Ca++
b b b b b




Myocardial hibernation is best described as:
b b b b b




A. Myocardial cells that are persistently ischemic and undergo metabolic ad
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aptation to prolong survivalb b b




B. Hypertrophy that occurs with loss of contractile function
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C. Temporary loss of contractile function that persists for hours to days afte
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r restoration of perfusion
b b b




D. Fibroblast proliferation and severe inflammatory response -
b b b b b b b


ANS ✓A. Myocardial cells that are persistently ischemic and undergo metabolic a
b b b b b b b b b b b b


daptation to prolong survival b b b




A thrombus is a blood clot that remains attached to a vessel wall. Which of t
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he following is NOT one of the main factors as proposed by Virchow?
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A. Obesity
b




B. Venous Stasis
b b




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C. Venous Endothelial damage
b b b




D. Hypercoagulable states - ANS ✓A. Obesity
b b b b b b




The decreased or instability to generate action potential due to hyperpolari
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zation or continued closure of inactivation gates is termed:
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A. Rhythmicity
b




B. Quiescence
b




C. Refractory period
b b




D. Afterload - ANS ✓C. Refractory period
b b b b b b




All of the following antihypertensive agents would be appropriate first line
b b b b b b b b b b b


treatments EXCEPT: b




a. Calcium channel blockers
b b b




b. Beta blockers
b b




c. Ace inhibitors or ARBs
b b b b




d. Diuretics such as Thiazide - ANS ✓b. Beta Blockers
b b b b b b b b b




STEMI would most likely present with:
b b b b b




a. Inverted T waves and Q waves
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b. Peaked T waves
b b b




c. Marked ST segment elevation
b b b b




d. Absence of troponin I or T - ANS ✓c. Marked ST segment elevation
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What area of the myocardium is affected by STEMI?
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a. Transmural (entire wall thickness)
b b b b




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b. Subendothelial area
b b




c. Just the right side
b b b b




d. Only the atria - ANS ✓a. Transmural (entire wall thickness)
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Which of the following is a correct statement regarding baroreceptor reflex
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activity on the heart?
b b b b




a. A drop in blood pressure would result in release of natriuretic peptides
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b. A drop in blood pressure would result in reflex to decrease heart rate, co
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ntractility, and peripheral resistance b b b




c. A rise in blood pressure would result in reflex to increase heart rate, cont
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ractility , and peripheral resistance
b b b b




d. A drop in blood pressure would result in reflex to increase heart rate, co
b b b b b b b b b b b b b b


ntractility, and peripheral resistance - b b b b


ANS ✓d. A drop in blood pressure would result in reflex to increase heart rate, co
b b b b b b b b b b b b b b b b


ntractility, and peripheral resistance b b b




The development of atherosclerotic plaques involve the formation of foam
b b b b b b b b b b


cells, which are best described as:
b b b b b




A. Transformed fibroblasts
b b




B. Cytokine secreting adipose cells
b b b b




C. Macrophages that engulf oxidized LDL
b b b b b




D. Endothelial cells that produce the gas nitric oxide -
b b b b b b b b b


ANS ✓C. Macrophages that engulf oxidized LDL
b b b b b b b




The isovolumetric contraction phase of the cardiac life cycle occurs:
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A. During atrial systole
b b b




B. When the AV valves are closed
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C. When the SL valves are open
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D. During diastole - ANS ✓B. When the AV valves are closed
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Choose the correct conduction pathway for a cardiac action potential:
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A. SA node to AV node to bundle branches to othe Bundle of HIS to purkinje
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fibers

B. SA node to AV node to Purkinje fibers to bundle of HIS to bundle branche
b b b b b b b b b b b b b b b


s

C. SA node to bundle of HIS to AV node to bundle branches to purkinje fiber
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s

D. SA node to AV node to bundle of HIS to bundle branches to purkinje fiber
b b b b b b b b b b b b b b b


s- b


bANS ✓D. SA node to AV node to bundle of HIS to bundle branches to purkinje fibe
b b b b b b b b b b b b b b b b


rs

Which of the following vessels carries oxygenated blood?
b b b b b b b




A. Inferior vena cava
b b b




B. Superior vena cava
b b b




C. Pulmonary artery
b b




D. Pulmonary Vein
b b




E. Inferior vena cava and superior vena cava - ANS ✓D. Pulmonary vein
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Which of the following can form an embolus?
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A. Fat b




B. Amniotic Fluid
b b




C. Air b




D. Bateria, especially within clots
b b b b




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