Question 1
Drugs known as calcium channel blockers can be used to
◦ constrict the coronary arteries.
◦ increase sympathetic stimulation of the myocardium.
◦ increase blood pressure.
◦ decrease the force of cardiac contraction.
◦ increase stroke volume.
Question 2
In the autorhythmic cells, the ________ channels open when the cell membrane potential is -60 mV. These channels are permeable to ________ and ________.
◦ If (funny), K+, Na+
◦ If, K+, Na+
◦ funny, K+, Na+