Calcium ions act as messengers, usually in combination with an intracellular protein called:
A) thyroid-stimulating hormone.
B) calcitonin.
C) adrenocorticotropic hormone.
D) calmodulin.
E) antidiuretic hormone.

Question

Quizplus · Accepted Answer

Calcium ions often act as second messengers in cellular processes, and they frequently do so in combination with calmodulin, a protein that can bind calcium ions and mediate various cellular activities in response to changes in calcium ion concentration.

Calcium Ions Act as Messengers, Usually in Combination with an Intracellular