Which of the following is not primarily a muscle of facial expression?
A) buccinator
B) depressor labii inferioris
C) risorius
D) masseter
E) mentalis
Answer: D
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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.
The structure that supports the spiral organ is the
A) tectorial membrane. B) basilar membrane. C) membranous labyrinth. D) vestibular duct. E) tympanic membrane.
Which of the following terms is used to describe bone with relatively high porosity?
A. cortical B. trabecular C. spongy D. all of the above
ADH (antidiuretic hormone) is synthesized by the ________, while TSH (thyroid-stimulating hormone) is synthesized by the ________.
A. posterior pituitary; hypothalamus B. posterior pituitary; thyroid C. kidney; thyroid D. hypothalamus; anterior pituitary E. kidney; anterior pituitary