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This figure shows the internal anatomy of the ear.What does "7" represent?


A) the cochlea
B) the vestibule
C) the semicircular duct
D) the stapes
E) the tympanic cavity

F) B) and E)
G) B) and C)

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These structures are all involved with spinal gating of pain signals except


A) nociceptors.
B) the spinothalamic tract.
C) lower motor neurons.
D) second-order neurons.
E) the reticulospinal tract.

F) C) and D)
G) A) and E)

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This figure shows the spiral organ (organ of Corti) .Which structure acts as a transducer?


A) 1
B) 6
C) 4
D) 5
E) 7

F) None of the above
G) A) and C)

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Vitamin A is necessary for the synthesis of rhodopsin.

A) True
B) False

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