Multiple Choice
A drug that decreased calcium levels in a muscle cell and thereby lowered the number of crossbridges formed during the heart's contractions would be a
A) positive chronotropic agent.
B) negative chronotropic agent.
C) positive inotropic agent.
D) negative inotropic agent.
Correct Answer:

Verified
Correct Answer:
Verified
Q13: The inferior,conical end of the heart is
Q30: The anterior part of each atrium is
Q98: Which segment of the ECG reflects the
Q99: Arteries carry blood toward the heart, while
Q102: As with action potentials in other types
Q104: The term "epicardium" is another name for
Q105: Around day 21 of development the primitive
Q106: Immediately prior to atrial contraction, blood continues
Q107: In an EKG, the P wave is
Q108: Most of the calcium that triggers contraction