A Stimulus to Which Afferent Neurons X, Y, and Z

question 64

Multiple Choice

A stimulus to which afferent neurons X, Y, and Z are sensitive is applied in the middle of Y's receptive field. The same stimulus simultaneously activates receptors on the periphery of the receptive fields of X and Z. Which of the following is likely to be true?

• A) The receptor potential in neurons X and Z will be more depolarized than in neuron Y.
• B) It won't be possible to discriminate which neuron's receptive field was stimulated at its center.
• C) The frequency of action potentials in the afferent pathway from neuron Y will be increased by excitatory interneurons projecting from the afferent pathways from neurons X and Z.
• D) The frequency of action potentials in neuron Y will be greater than that in neurons X and Z.
• E) The receptor potentials in all three neurons will achieve the same, average value.

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