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The olfactory receptors can be activated by as few as ________ odorant molecules.

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When light encounters a medium of different density, it is bent or ________.

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The ________ ear collects sounds waves and transmits them to the ________ ear, which contains auditory ossicles.


A) inner; middle
B) outer; middle
C) outer; inner
D) middle; inner
E) none of the above

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

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An area of the retina that contains only cones and is the site of sharpest vision is the


A) outer segment.
B) inner segment.
C) fovea.
D) optic disc.
E) tapetum lucidum.

F) A) and C)
G) A) and B)

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The sensory receptors of the semicircular canals are located in the


A) saccules.
B) ampullae.
C) perilymph.
D) utricles.
E) cupulae.

F) A) and B)
G) D) and E)

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The sense of taste is also known as ________.

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Which of the following descriptions best matches the term basilar membrane?


A) moves up and down when the stapes moves back and forth
B) transmits movement of the tympanic membrane to the inner ear
C) supports the olfactory organ
D) tiny duct necessary for the static sense of equilibrium
E) covers over the oval window

F) All of the above
G) A) and B)

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Each gustatory cell extends ________ (or taste hairs) into the surrounding fluids through a narrow taste pore.

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