A 13-year-old female took a weight loss drug that activated the sympathetic nervous system. Which of the following would be expected?
A) Decreased myocardial contraction
B) Decreased heart rate
C) Increased cardiac cycle speed
D) Increased intranodal conduction time

Question

Quizplus · Accepted Answer

Activation of the sympathetic nervous system causes an increase in heart rate and cardiac output, leading to an increase in cardiac cycle speed. A decrease in myocardial contraction or heart rate would not be expected with sympathetic activation. Intranodal conduction time may decrease with sympathetic activation, not increase.

A 13-Year-Old Female Took a Weight Loss Drug That Activated