Which one of the following is NOT a second me | vedclass

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Question

(D) Second messengers are intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules (the fir

Vedclass · Accepted Answer

$Mg^{++}$

Vedclass · Answer

(D) Second messengers are intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules (the first messengers). Common examples of second messengers include $cAMP$,$cGMP$,$IP_3$ (inositol trisphosphate),$DAG$ (diacylglycerol),and $Ca^{++}$ ions. $Mg^{++}$ ions act as essential cofactors for many enzymes and stabilize various cellular structures,but they do not function as second messengers in signal transduction pathways.

Row	$I, II, III$
$A$. digestive, hormones, circulatory
$B$. endocrine, enzymes, lymphatic
$C$. endocrine, hormones, circulatory
$D$. digestive, enzymes, lymphatic

Which one of the following is $NOT$ a second messenger?

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