Multiple Choice
An increase in extracellular Ca2+ generally increases
A) the heart rate.
B) the force of contraction.
C) autonomic stimulation of the heart.
D) Na+ channel opening.
E) the frequency of the action potentials.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q152: Chemoreceptors sensitive to blood carbon dioxide levels
Q153: Which vessels transport blood to the right
Q154: If the SA node is nonfunctional, which
Q155: When a pacemaker potential in the SA
Q156: The period of isovolumetric contraction is immediately
Q158: The inner lining of the pericardial cavity
Q159: What is the foramen ovale?<br>A) An opening
Q160: Depolarization of a cardiac muscle cell occurs
Q161: The heart<br>A) is a four-chambered muscular pump.<br>B)
Q162: Aortic stenosis results from<br>A) a hole in