Which of the following sets of differences best describes the hemodynamics of the pulmonary circulation when compared to the systemic circulation? (1) Flow, (2) Resistance, (3) Arterial pressure
A. (1) The same, (2) Lower, (3) Lower
B. (1) The same, (2) Higher, (3) Lower
C. (1) Lower, (2) Lower, (3) Lower
D. (1) Higher, (2) Higher, (3) Higher
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The number of action potentials per minute each type of autorhythmic cell can generate under resting conditions is as follows:
A. the rate for the SA node is 70-80, for the AV node is 40-60 and for the Bundle of His and Purkinje fiber is 20-40
B. the rate for the SA node is 70-80, for the AV node is 70-80 and for the Bundle of His and Purkinje fiber is 40-60
C. the rate for the SA node is 70-80, for the AV node is 20-40 and for the Bundle of His and Purkinje fiber is 40-60
D. the rate for the SA node is 40-60, for the AV node is 70-80 and for the Bundle of His and Purkinje fiber is 40-60
E. the rate for the SA node is 40-60, for the AV node is 70-80 and for the Bundle of His and Purkinje fiber is 20-40