Multiple Choice Quiz

Please answer all questions


1	Sensory receptors
		A)	are classified functionally based on their adequate stimulus.
		B)	adapt to maintained constant stimulation.
		C)	when stimulated always induce perception of the adequate stimulus.
		D)	all of the above.


2	Generator potentials
		A)	are all-or-none.
		B)	have refractory periods.
		C)	induce action potentials in associated afferent neurons.
		D)	all of the above.


3	Damage to the tip of the tongue would prevent
		A)	food substances which stimulate gustducin mediated receptors from being activated.
		B)	food substances containing Na⁺ from activating receptors.
		C)	food substances containing H⁺ from activating receptors.
		D)	none of the above.


4	Otoliths are found within the
		A)	semicircular canals.
		B)	saccule.
		C)	cupula.
		D)	none of the above.


5	Stereocilia embedded within the cupula
		A)	are bent due the actions of the otoliths.
		B)	stimulate depolarization when they bend away from the kinocilium.
		C)	are responsible for detecting rotational movement.
		D)	bend in the same direction as the rotation of the body.


6	Damage to the stapedius muscle would result in
		A)	the inability to dampen the effects of excessively loud sounds.
		B)	damage to the hair cells in the cupula.
		C)	increased numbers of middle ear infections.
		D)	rupture of the tympanic membrane.


7	During the process of hearing
		A)	high frequency sound waves induce vibrations of the basilar membrane near the helicotrema.
		B)	the medial geniculate nucleus serves to relay auditory information to the temporal lobe.
		C)	the superior colliculi are involved in transmission of auditory impulses.
		D)	none of the above.


8	The greatest amount of refraction occurs when light passes from
		A)	the lens into the vitreous humor.
		B)	the aqueous humor into the lens.
		C)	the cornea into the aqueous humor.
		D)	the air into the cornea.


9	Production of aqueous humor would be decreased if
		A)	the cornea was damaged.
		B)	the lens was damaged.
		C)	the ciliary body was damaged.
		D)	the iris was damaged.


10	You are focusing on a bright light three feet in front of you. Which of the following describe some of the physiological responses which would occur?
		A)	The pupils would dilate and the ciliary muscles would contract.
		B)	The pupils would dilate and the ciliary muscles would relax.
		C)	The pupils would constrict and the ciliary muscles would contract.
		D)	The pupils would constrict and the ciliary muscles would relax.


11	Which of the following is normally due to a loss of accommodation?
		A)	Glaucoma.
		B)	Hyperopia.
		C)	Myopia.
		D)	Presbyopia.


12	During the visual process
		A)	absorption of light causes a change in the conformation of 11-cis-retinene.
		B)	activation of a photoreceptor causes Na⁺ channels to open.
		C)	photoreceptors transmit information directly to ganglion cells.
		D)	the greatest visual acuity occurs when light is focused on lateral portions of the retina.


13	Color blindness
		A)	is due to the excessive production of one or more type of cones.
		B)	is due to the lack of production of one or more opsins.
		C)	is a dominant trait carried on the Y-chromosome.
		D)	is more prevalent in women than men.


14	Which of the following is true regarding the neural pathways of transmitting visual information?
		A)	The majority of fibers from the optic tract project to the superior colliculus.
		B)	The geniculostriate system is primarily involved in coordinating eye and body movements.
		C)	The tectal system is primarily involved in visual perception.
		D)	The lateral geniculate nucleus relays information to the striate cortex.


15	Damage to the medial rectus muscle would prevent
		A)	rotation of the eye toward the midline.
		B)	rotation of the eye away from the midline.
		C)	rotation of the eye upward and toward the midline.
		D)	rotation of the eye downward and away from the midline.

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