Place the Following Steps in the Correct Order for Transduction

question 75

Multiple Choice

Place the following steps in the correct order for transduction of a chemical odorant into a nerve signal.
1) Odorants reach receptors in the cilia of olfactory neurons.
2) cAMP opens ions channels that allow sodium and calcium ions to enter the cell.
3) The G-protein activates an enzyme,adenylate cyclase,to convert ATP into cyclic AMP (cAMP) .
4) The binding of an odorant activates a G-protein which then detaches from the receptor.
5) The membrane is depolarized.Depolarization that reaches threshold at the axon hillock triggers action potential and transduction has been achieved.

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

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