When an olfactory receptor is stimulated, what type of change must happen before

Question

When an olfactory receptor is stimulated, what type of change must happen before it signals the brain that a change has occurred? Choose the best answer A generator potential must be initiated The receptor must be depolarized to threshold The receptor must produce a generator potential An action potential must be generated Which of the following statements is true regarding gustatory receptors? Choose the best answer Gustatory receptors generate receptor potentials in response to different chemicals A taste receptor for salt chemicals acts differently from a taste receptor for sweet chemicals A taste receptor for sour chemicals acts the same as a taste receptor for umami chemicals. Gustatory receptors have excitable membranes. Why is there a synaptic delay in gustatory receptors that is not seen in olfactory receptors? Choose the best answer Gustatory receptors have a different threshold from olfactory receptors Gustatory receptors have a separate receptor cell and sensory neuron. olfactory receptors have a different threshold Gustatory receptors have non-excitable membranes

Explanation / Answer

d - the receptor must produce a generator potential

(First the olfactory receptor neuron will generate a graded potential to reach the cell's threshold. At threshold, the cell will generate an action potential or series of action potentials. The action potential or series of action potentials can be referred to as the generator potential that is sent to the brain for decoding.)

c - a taste receptor for salt chemicals acts differently from a taste receptor for sweet chemicals

(Salt & sour chemicals both trigger direct signaling actions, while sweet, bitter & umami, much like odorants, trigger G-protein-linked second messenger pathways.)

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