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Questions and Answers
During strenuous exercise, the work output of the heart increases by approximately how much?
During strenuous exercise, the work output of the heart increases by approximately how much?
- 6-7 times
- 8-9 times (correct)
- 2-3 times
- 4-5 times
What percentage of coronary blood flow is used by the heart during strenuous exercise?
What percentage of coronary blood flow is used by the heart during strenuous exercise?
- 70-80% (correct)
- 10-20%
- 30-40%
- 50-60%
How does sympathetic stimulation indirectly affect the work output of the heart during exercise?
How does sympathetic stimulation indirectly affect the work output of the heart during exercise?
- It varies depending on the individual
- It decreases the work output
- It has no effect on the work output
- It increases the work output (correct)
What is the primary role of sympathetic innervation in the heart?
What is the primary role of sympathetic innervation in the heart?
What effect does noradrenaline have on skeletal muscle arterioles?
What effect does noradrenaline have on skeletal muscle arterioles?
What effect does adrenaline have on skeletal muscle arterioles?
What effect does adrenaline have on skeletal muscle arterioles?
Which type of receptor dominates in causing vasodilation of skeletal muscle arterioles?
Which type of receptor dominates in causing vasodilation of skeletal muscle arterioles?
What is the primary factor that increases oxygen demand during exercise?
What is the primary factor that increases oxygen demand during exercise?
How does the closing of arterioles during systole affect the diastolic filling period during exercise?
How does the closing of arterioles during systole affect the diastolic filling period during exercise?
Which of the following is the primary controller of coronary blood flow?
Which of the following is the primary controller of coronary blood flow?
Which artery supplies blood to the walls of the left atrium and left ventricle?
Which artery supplies blood to the walls of the left atrium and left ventricle?
Which of the following is NOT a learning outcome for the lecture on exercise and coronary blood flow?
Which of the following is NOT a learning outcome for the lecture on exercise and coronary blood flow?
Which part of the interventricular septum does the right coronary artery supply?
Which part of the interventricular septum does the right coronary artery supply?
Which vein drains into the right atrium via the coronary sinus?
Which vein drains into the right atrium via the coronary sinus?
Which of the following is NOT a physiological property of the heart?
Which of the following is NOT a physiological property of the heart?
What is the main topic of the lecture on cardiovascular physiology?
What is the main topic of the lecture on cardiovascular physiology?
Which of the following is NOT a control mechanism for blood pressure?
Which of the following is NOT a control mechanism for blood pressure?
Which textbook provides information on coronary blood flow?
Which textbook provides information on coronary blood flow?
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