Physiology Quiz - Cardiovascular Physiology - Part 5
The cardiovascular system is composed of the heart and blood vessels. The basic function of the heart is to pump blood through the blood vessels. The basic function of the blood vessels is to serve as conduits to carry blood away from the heart to the tissues, and to return blood from the tissues back to heart. Test your basic knowledge of cardiovascular physiology by taking this simple quiz.
(1) The largest total cross-sectional area of blood vessels is found in this region along the vasculature:
(2) Cells of the sinoatrial node are the primary pacemakers of the heart. In the absence of any input from the autonomic nervous system, how many action potentials do these cells generate every minute?
(3) The pacemaker cells of the heart have stable resting membrane potentials.
(4) In a typical ventricular myocyte, the refractory period is approximately:
(5) After a heart contraction, all of the following play a role in reducing the cytoplasmic Ca2+ concentration EXCEPT: