.58 points Complete the sentences describing activity of the muscarinic ACh rece

Question

.58 points Complete the sentences describing activity of the muscarinic ACh receptor and G-proteins ACh binds 2.G-protein 3 nicotinic G-proteins alpha-beta beta, gamma ion channels alpha The muscarinic ACh receptors are formed from only a single subunit and do not contain ACh receptors. Rather, binding of ACh to the muscarínic receptor activates a ike the complex of proteins in the cell membrane known as by GDP and GTP, guanosine nucleotides. There are 3 G-protein subunits: alpha, beta and gamma. Binding of ACh causes the subunit to dissociate from the other two, which form the subunit or the -complex. ther the alpha complex then diffuses through the membrane until it binds to an ion channel and causes it to open or close. Reset MacBook Air F2 F4 56 F7

Explanation / Answer

The muscarinic ACh receptors are formed from only a single subunit and do not contain ION CHANNELS like the NICOTINIC Ach receptors.

Rather binding of ACh to the muscarinsic receptor activated a complex of proteins in the cell membrane known as G PROTEINS because their activity is influenced by GDP and GTP,guanosine nucleotide.

There are 3 G-prptein subunits,alpha,beta and gamma.Binding of ACh causes the ALPHA BETA unit to dissociate from the other two which form the BETA GAMMA complex..

Either the alpha subunit of the BETA GAMMA complex then diffuses through the membrane unit it binds to an ion channel and causes it to open or close.

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