Which extracellular chemical messenger acts mostly locally due to its chemical instability and very short half-life?
A) nitric oxide
B) epinephrine
C) oxytocin
D) insulin

Question

Quizplus · Accepted Answer

Nitric oxide is a gas molecule that is highly unstable and has a very short half-life, meaning it breaks down quickly in the body. It is produced and released by cells locally and therefore acts mostly as a local messenger.

Which Extracellular Chemical Messenger Acts Mostly Locally Due to Its