Multiple Choice
For the repolarization phase of an SA nodal cell action potential,
A) sodium and potassium channels open.
B) calcium channels open and sodium channels close.
C) calcium and potassium channels close.
D) calcium channels close and potassium channels open.
E) sodium and chloride channels open.
Correct Answer:

Verified
Correct Answer:
Verified
Q2: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4930/.jpg" alt=" -In this figure
Q44: Sympathetic innervation of the heart<br>A: increases the
Q85: The base of the heart faces in
Q88: Which circuit of the cardiovascular system includes
Q89: During a cardiac cycle, how many of
Q91: Cardiac output is usually expressed in<br>A) beats
Q92: If the stroke volume is unequal between
Q93: Contrast the length-tension relationship for cardiac muscle
Q94: The metabolic pathways of cardiac muscle make
Q95: Cardiac reserve is<br>A) the potential increase in