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The Following Steps Occur in Rods When They Are Excited

Question 40

Multiple Choice

The following steps occur in rods when they are excited by a photon of light.Place them in the correct sequence.
1) Membrane sodium channels close.
2) cGMP is broken down.
3) The membrane hyperpolarizes and the rate of neurotransmitter release declines.
4) Transducin is activated.
5) Opsin is activated.


A) 1, 5, 2, 4, 3
B) 5, 4, 2, 1, 3
C) 3, 5, 2, 1, 4
D) 4, 5, 2, 1, 3
E) 1, 3, 4, 5, 2

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