A) cGMP
B) Calcium
C) Sodium
D) cAMP
Correct Answer: C
Solution :
Second messengers are the organic molecules and sometimes the metal ions, act as intracellular signals, whose production or release usually amplifies a signal such as a hormone, received at the cell surface. Sodium (Na) is not a second messenger in hormone action. Cyclic Adenosine Monophosphate (cAMP) was the first "second messenger" to be discovered. In addition to cyclic AMP, Cyclic Guanosine Monophosphate (cGMP) functions as a second messenger in certain cases. Calcium ions (Ca2+) also act as second messenger in phospholipase C?Ca+ second messenger system,
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