Consider the two statements and use the following key to choose your answer.
-(1) Rate of muscle contraction when beta adrenergic receptors of the heart are stimulated
(2) Rate of muscle contraction when beta adrenergic receptors of intestinal muscle are stimulated
A)First item is greater than the second item.
B)First item is less than the second item.
C)Both items are equal or nearly equal.

Question

Quizplus · Accepted Answer

When beta adrenergic receptors of the heart are stimulated, it leads to an increase in the rate and force of heart muscle contractions. In contrast, stimulation of beta adrenergic receptors in the intestinal muscles generally leads to relaxation, not an increase in contraction rate. Therefore, the rate of muscle contraction is greater in the heart than in the intestinal muscles under these conditions.

Consider the Two Statements and Use the Following Key to Choose