The gas, nitric oxide (NO), is an extracellular signaling molecule travels through interstitial fluid to reach target cells such as smooth muscle. NO acts here as a/an
A) neurotransmitter
B) local mediator
C) hormone
D) enzyme

Question

Quizplus · Accepted Answer

Nitric oxide (NO) acts as a local mediator which means it acts in the immediate vicinity of the cells it was produced in. It is not a neurotransmitter, hormone or enzyme.

The Gas, Nitric Oxide (NO), Is an Extracellular Signaling Molecule