Question

Which one of the following is not a second
messenger in hormone action ?
(a) Calcium (b) Sodium
(c) cAMP (d) cGMP

Answer 1

Answer:

D option

Explanation:

Answer 2

Sodium is not a second messenger in hormone action.

* Second messengers are molecules secreted in the cell in response to an exposure to the first messengers.

* It helps in relaying of signalling pathways.

*Some of the pathways in which they are used are:

1. Epinephrine stimulated synthesis of cAMP.

2. G-protein activation pathway that leads to synthesis of cAMP.

3.  Muscle contraction, release of neurotransmitter- Calcium plays a role here.