Physiology MCQ5 PDF

MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM MCQ Assignment Week 5 Due Oct 27 at 11:59pm Points 20 Questions 25 Time Limit None Allowed Attempts Unlimited Instructions Instruction...

MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM MCQ Assignment Week 5 Due Oct 27 at 11:59pm Points 20 Questions 25 Time Limit None Allowed Attempts Unlimited Instructions Instructions: Instructions: Answer the multiple-choice questions provided. The assignment will be uploaded automatically and should be completed before the next session. Do not discuss the assignment with other people. Points: 20 Take the Quiz Again Attempt History Attempt Time Score KEPT Attempt 2 3 minutes 20 out of 20 LATEST Attempt 2 3 minutes 20 out of 20 Attempt 1 7,016 minutes 19 out of 20  Correct answers are hidden. Score for this attempt: 20 out of 20 Submitted Oct 27 at 7:03pm This attempt took 3 minutes.  Question 1 0.5 / 0.5 pts https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 1 of 7 MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM Prostacyclin, PGI2, prevents A. vasodilation. B. platelet aggregation. C. vasoconstriction. D. clot retraction.  Question 2 0.5 / 0.5 pts The pathway of blood from the heart to the lungs and back to the heart is the A. cardiac circulation. B. systemic circulation. C. pulmonary circulation. D. pleural circulation.  Question 3 0.5 / 0.5 pts What valve keeps blood from flowing back into the right atrium from the right ventricle? A. tricuspid valve B. bicuspid valve C. mitral valve D. pulmonary semilunar valve  Question 4 0.5 / 0.5 pts What structures keep the AV valves from everting under high ventricular pressure? A. annuli fibrosis B. interventricular and interatrial septa C. papillary muscles and chordae tendineae D. semilunar valves  Question 5 0.5 / 0.5 pts During isovolumetric ventricular contraction ventricular pressure is https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 2 of 7 MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM A. increasing. B. decreasing. C. unchanged.  Question 6 0.5 / 0.5 pts During isovolumetric ventricular relaxation A. left ventricular pressure exceeds aortic pressure. B. atrial pressure is less than ventricular pressure. C. ventricular pressure is increasing. D. the atrioventricular valves are open.  Question 7 0.5 / 0.5 pts Systole refers to the ______ of the heart. A. relaxation B. filling C. contraction D. blood flow  Question 8 0.5 / 0.5 pts What causes the semilunar valves to close? A. higher pressure in the ventricles than in the atria B. higher pressure in the aorta and pulmonary trunk than in the ventricles C. higher pressure in the atria than in the ventricles D. higher pressure in the ventricles than aorta and pulmonary trunk  Question 9 0.5 / 0.5 pts What occurs when the pressure in the ventricles drops below the pressure of the atria? A. AV valves open B. AV valves close https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 3 of 7 MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM C. SL valves open D. SL valves close  Question 10 0.5 / 0.5 pts Cardiac ________ channels are called hyperpolarization cyclic nucleotide (HCN) channels because they open in response to hyperpolarization. A. atrial B. Purkinje C. pacemaker D. ventricular  Question 11 1 / 1 pts What part of the heart's conduction system acts as the primary pacemaker? A. SA node B. AV node C. Bundle of His D. Purkinje fibers  Question 12 1 / 1 pts The action potential of cardiac pacemaker cells is caused by A. inward diffusion of Na+. B. inward diffusion of Ca2+. C. inward diffusion of K+. D. outward diffusion of K+.  Question 13 1 / 1 pts Norepinephrine is released from __________ nerves, causing heart rate to ______. A. parasympathetic, increase. B. parasympathetic, decrease. https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 4 of 7 MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM C. sympathetic, increase. D. sympathetic, decrease.  Question 14 1 / 1 pts What type of receptors do norepinephrine and epinephrine bind in the heart? A. ï ¢1-adrenergic B. ï ¡-adrenergic C. muscarinic D. nicotinic  Question 15 1 / 1 pts The effect of acetylcholine binding to its receptors in the heart is a heart rate A. increase. B. decrease. C. unchanged.  Question 16 1 / 1 pts Sympathetic stimulation of the heart will A. increase the rate of diastolic depolarization. B. increase conduction rate. C. increase the strength of contraction. D. All apply.  Question 17 1 / 1 pts The volume of blood in the ventricles at the end of diastole is known as the A. after-load. B. pre-diastolic volume (PDV). C. stroke volume (SV). D. end-diastolic volume (EDV). https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 5 of 7 MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM  Question 18 1 / 1 pts The major plasma protein is A. alpha globulin. B. beta globulin. C. fibrinogen. D. albumin.  Question 19 1 / 1 pts Decreased liver protein synthesis would cause the amount of ______________ and ______________ in the blood to be decreased. A. thromboplastin, RBCs B. RBCs, WBCs C. albumin, fibrinogen D. platelets, albumin  Question 20 1 / 1 pts The prostaglandin, thromboxane A2, stimulates A. vasodilation. B. platelet aggregation. C. platelet repelling. D. vasoconstriction.  Question 21 1 / 1 pts Which of the following stimulates the formation of the platelet plug? A. von Willebrand's factor B. ADP C. thromboxane A2 D. All apply https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 6 of 7 MCQ Assignment Week 5: PHYS111 Human Physiology AOS20241002 N2410-1 10/28/24, 9:12 PM  Question 22 1 / 1 pts Damage to tissues stimulates the activation of the ______________ blood clotting pathway. A. complement B. hemophilic C. intrinsic D. extrinsic  Question 23 1 / 1 pts What ion is necessary for the clotting process? A. Na+ B. K+ C. Ca2+ D. Mg2+  Question 24 1 / 1 pts The final protein that forms a blood clot is A. fibrin. B. thrombin. C. thromboplastin. D. plasmin.  Question 25 1 / 1 pts Vitamin K is needed for A. proper clotting factor function. B. directly activating fibrinogen. C. directly stabilizing the fibrin polymer. D. activating antithrombin III. Quiz Score: 20 out of 20 https://canvas.americancareercollege.edu/courses/11142/quizzes/66370?module_item_id=879841 Page 7 of 7