Based on their effects, which pair below would not be expected to be active at the same time and place?
A) prostaglandin F and nitric oxide
B) growth hormone and insulin-like growth factors
C) endocrine and exocrine glands
D) hormones and target cells
E) neurosecretory cells and neurotransmitters

Question

Quizplus · Accepted Answer

Prostaglandin F and nitric oxide have opposite effects on smooth muscle contraction, with prostaglandin F causing contraction and nitric oxide causing relaxation. Therefore, they would not be expected to be active at the same time and place. The other pairs listed are not necessarily mutually exclusive and could be active at the same time and place.

Based on Their Effects, Which Pair Below Would Not Be