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When the head moves, fluids in the ________ canals move and activate the equilibrium receptors.

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semicircular

The white of the eye, called the ________, is the tough, outermost layer of the eye and covers all except the front of the eye.

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The clear, circular disk located just posterior to the iris that helps the eye focus is the ________, which is shown at letter F in the figure.

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The watery fluid that provides nutrients to and bathes the structures in the anterior chamber of the eyeball is the ________.

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The innermost layer of the eye, shown at letter C in the figure, is the ________.

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The three tiny bones called ear ossicles are the ________, incus, and stapes.

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malleus

Letter A in the figure indicates the pinna, or ________, which is part of the external ear.

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The ________, shown at letter I in the figure, controls the amount of light that enters the eye.

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The ____ controls the amount of light entering the eye.


A) choroid
B) retina
C) cornea
D) lens
E) iris

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

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Which of the following is the beginning of the inner ear?


A) Ear ossicle
B) Oval window
C) Vestibule
D) Tympanic membrane
E) Bony labyrinth

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

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The ________, or hammer, is one of the smallest bones in the body and is indicated by letter D in the figure.

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Which of the following is the inner layer of the eye, which contains rods and cones?


A) Pupil
B) Cornea
C) Lens
D) Retina
E) Conjunctiva

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

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D

The sclera of the eye gives way to the cornea in an area known as the ________, or corneal-scleral junction.

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Which taste cells are concentrated on the tip and sides of the tongue?


A) Salty
B) Bitter
C) Sweet
D) Sour
E) Umami

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

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Mrs. Whitley, a 61-year-old patient, calls the office this morning. She says she is afraid to drive to the office, because when she woke up this morning, her vision was "funny, like everything is wavering in front of my eyes." She is also seeing flashes of light and floaters. Which of the following statements is your best response to Mrs. Whitley?


A) "I can fit you in at 3:00 this afternoon. Please find a friend or relative to drive you here."
B) "Don't worry, Mrs. Whitley. It sounds like a visual migraine. It will go away soon."
C) "Mrs. Whitley, please have someone drive you to the hospital immediately, or call 911."
D) "It's probably stress. Lie down and rest for a while, and if it doesn't improve, call me back."
E) "We all have episodes like this, Mrs. Whitley. It is just a part of growing older."

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

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Smell receptors and taste cells are both a special type of receptor called a(n) _____.

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A(n) ________ hearing loss is caused by an interruption in the transmission of sound waves to the inner ear.

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Smell receptors send their information to the ________ nerves.

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For which of the following taste sensations are the taste cells concentrated on the tip of the tongue?


A) Salty
B) Bitter
C) Sweet
D) Sour
E) Umami

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

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The ____ is a wedge-shaped thickening in the middle layer of the eyeball that controls the shape of the lens.


A) sclera
B) iris
C) choroid
D) ciliary body
E) retina

F) B) and D)
G) B) and C)

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