If a drug is administered to block the heart's adrenergic receptors,how is heart rate affected during exercise?
A)The heart will stop beating.
B)Heart rate will be unable to increase in response to exercise.
C)Heart rate will increase in response to the drug.
D)The drug has no effect on heart rate during exercise.

Question

Quizplus · Accepted Answer

Adrenergic receptors respond to adrenaline and noradrenaline, which are released during exercise to increase heart rate. Blocking these receptors will prevent the heart from responding to these hormones, leading to a reduced ability to increase heart rate during exercise. However, it will not cause the heart to stop beating or increase heart rate in response to the drug itself.

If a Drug Is Administered to Block the Heart's Adrenergic