Which of the following is one mechanism by which decreased cytosolic Ca levels,

Question

Which of the following is one mechanism by which decreased cytosolic Ca levels, in the outer segments of photoreceptor cells, contribute to light adaptation?

A.

calcium binds to GCAPs, leading to decreases in intracellular cGMP

B.

calcium dissociates from GCAPs, leading to increases in intracellular cGMP

C.

calcium binds to calmodulin, which increases the affinity of cyclic nucleotide-gated channels for cGMP

D.

calcium dissociates from recoverin, which leads to decreased rhodopsin kinase activity

E.

calcium binds to recoverin, which leads to increased rhodopsin kinase activity

A.

calcium binds to GCAPs, leading to decreases in intracellular cGMP

B.

calcium dissociates from GCAPs, leading to increases in intracellular cGMP

C.

calcium binds to calmodulin, which increases the affinity of cyclic nucleotide-gated channels for cGMP

D.

calcium dissociates from recoverin, which leads to decreased rhodopsin kinase activity

E.

calcium binds to recoverin, which leads to increased rhodopsin kinase activity

Explanation / Answer

E. calcium binds to recoverin, which leads to increased rhodopsin kinase activity

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