10 Jun BIO 139 – The __ is the pump and pressure-head of the Pulmonary
Question
36. The ________________________ is the “pump” and “pressure-head” of the Pulmonary
Circulation.
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
E. None of the above is correct.
37, The ________________________ is the “pump” and “pressure-head” of the Systemic
Circulation.
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
E. None of the above is correct.
38. Which of the following is true concerning the Systolic Phase of the cardiac cycle?
A. All cardiac valves are open during systole.
B. For only a very short period of time, (just before the aortic valve opens, and just before the AV-valves re-open) all cardiac valves are closed, during systole.
C. All cardiac valves are never either closed nor open during systole.
D. The aortic valve closes just before the AV-valve closes; and the pulmonary arterial valve closes just before the AV-valve closes.
E. None of the above is correct.
39. Which of the following is true concerning Diastole?
A. In the normal ‘resting’ cardiac cycle, Systole takes much more time than Diastole.
B. Increasing heart rate increases the time spent within Diastole.
C. All cardiac valves are closed during Diastole.
D. Diastole is essential to cardiac function because Diastole is also known as the “period of filling”.
E. None of the above is correct.
40. The Calcium that enters the Ventricular Muscle Fibers during the Cardiac Action
Potential is called:
A. Stimulus-Calcium
B. Actuating-Calcium
C. Rectified-Calcium
D. Enhanced-Calcium
E. Trigger-Calcium
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