Refer to the Figure Below, Which Shows the Signal Transduction

question 183

Multiple Choice

Refer to the figure below, which shows the signal transduction pathway initiated by the binding of an odorant molecule to an olfactory receptor of an olfactory neuron. Information will be sent to the brain because of changes in ion concentrations within the neuron.What specific event is most directly responsible for the change in intracellular ion concentrations?

• A) Activation of G protein-coupled odorant receptors
• B) An odorant molecule binding its receptor
• C) cAMP binding to its gated channel
• D) Synthesis of cAMP
• E) Hydrolysis of GTP

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