AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Consider this pathway:epinephrine ➡ G protien coupled receptor➡ G protein ➡ adenylyl cyclase ➡ cAMP. Identify the second messenger.
A
cAMP
B
G protein
C
GTP
D
adenylyl cyclase
Explanation: 

Detailed explanation-1: -Epinephrine and Norepinephrine Like the glucagon receptor, -adrenergic receptors are linked to a Gs signaling pathway that increases intracellular cAMP. Epinephrine also promotes glycogenolysis and gluconeogenesis through the 1 adrenergic receptor, which is coupled to the Gq/IP3/DAG signaling pathway.

Detailed explanation-2: -Definition: A G protein-coupled receptor signaling pathway in which the signal is transmitted via the activation of adenylyl cyclase activity and a subsequent increase in the intracellular concentration of cyclic AMP (cAMP).

Detailed explanation-3: -When epinephrine binds to its receptor on a muscle cell (a type of G protein-coupled receptor), it triggers a signal transduction cascade involving production of the second messenger molecule cyclic AMP (cAMP).

There is 1 question to complete.