The Smell of Bread Baking Triggers a Sensory Response Comprising

Multiple Choice

The smell of bread baking triggers a sensory response comprising multiple steps.Which is the first step of this process?

A) A G protein activates an enzyme.
B) A second messenger opens an ion channel.
C) Graded depolarization leads to an action potential.
D) An enzyme stimulates second messenger production.
E) An odorant molecule binds to a G protein-linked receptor.