Activity Resulting from Second Messenger The second messengers will go on to act

Question

Activity Resulting from Second Messenger The second messengers will go on to activate other enzymes or ion channels. One of the main second messenger pathways is the cyclic AMP (cAMP) signal pathway. The cAMP pathway typically activates Active 2nd protein kinase enzymes, which transfer phosphate bonds from ATP to other proteins in a further cascade of events ending in various metabolic and structural changes in the cell messenger In this way, a single extracellular signal molecule starts a chain of events that results in the production of active second messengers that can activate many other enzymes or ion channels. This amplification effect is tremendous, and ultimately results in a variety of cellular responses including those important to neurotransmission, smell, vision, and the action of hormones. Part E Select the best answer describing the importance of the active second messenger Hints O Molecules like cAMP or ions will inactivate cell proteins. O The 2nd messenger is used to deactivate the G protein for the next reaction sequence. O Molecules like cAMP or ions like Ca2+ will perpetuate the 1st messengers signal intracellularly. O 2nd messengers are used specifically to activate proteins.

Explanation / Answer

Answer: Molecules like cAMP or ions like Ca2+ will perpetuate the 1st messengers signal intracellularly.

These molecules are the aforementioned secondary messengers which are activated/channeled by G proteins and amplify the signal of the primary messengers

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