Cyclic GMP plays a critical role in phototransduction because

Question

Accepted Answer

It is broken down to close off ion channels

Answer

It activates the rhodopsin molceule when it is activated by light

Answer

It's role in the sequence of phototransduction reactions is to cause ion channels to activate Ca ++

Answer

It pumps out the Na +  that enters the photoreceptor outer segment

Answer

When activated by light, it then binds PDE to convert it to an active form

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