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.
D
You might also like to view...
The joint movement called eversion involves
A. turning the palm of the hand or sole of the foot laterally. B. lateral rotation of the coxal joint. C. turning the sole of the foot laterally. D. turning the palm of the hand laterally. E. medial rotation of the coxal joint.
How are hypoxia and anoxia different?
A) Hypoxia is low tissue oxygen levels; anoxia is the complete cutoff of oxygen supply. B) Hypoxia is low tissue oxygen levels; anoxia is low tissue carbon dioxide levels. C) Hypoxia is low tissue carbon dioxide levels; anoxia is low tissue oxygen levels. D) Hypoxia is low lung oxygen levels; anoxia is low lung carbon dioxide levels. E) Hypoxia is low lung carbon dioxide levels; anoxia is low lung oxygen levels.
If a muscle crosses the ankle joint anteriorly with a vertical direction to its fibers, what action of the foot does it have?
a. Dorsiflexion b. Plantarflexion c. Inversion d. Eversion
The background rate of sympathetic and parasympathetic activity is called ________.
A. "fight-or-flight" activity B. autonomic reflex arc activity C. visceral tone D. autonomic tone E. visceral motor activity