What ion is sometimes used as a second messenger of amino acid-based hormones?
A) chlorine
B) calcium
C) iron
D) sodium

Question

Quizplus · Accepted Answer

Calcium is a common ion used as a second messenger in the signaling pathways of amino acid-based hormones such as thyroid hormone and catecholamines. When these hormones bind to their receptors on the cell surface, it activates a signaling cascade that results in an increase in intracellular calcium concentration. This increase in calcium can then trigger various cellular responses such as gene expression, muscle contraction, and secretion. Chlorine, iron, and sodium are not commonly used as second messengers in these pathways.

What Ion Is Sometimes Used as a Second Messenger of Amino