A&P Lecture - HW (Ch. 17)

Select the correct pathway of sound waves from the auricle to the spiral organ of Corti? *external auditory canal → tympanic membrane → maleus → incus → stapes → oval window → perilymph *external auditory canal → tympanic membrane → stapes → incus → maleus → secondary tympanic membrane → endolymph *internal auditory canal → tympanic membrane → maleus → incus → stapes → secondary tympanic membrane → Perilymph

*external auditory canal → tympanic membrane → maleus → incus → stapes → oval window → perilymph

Perilymph is located in the 1. scala tympani 2. cochlear duct 3. bony labyrinth of the semicircular ducts -1 only -2 only -3 only -1 and 2 -1 and 3

-1 and 3

Which of the cells listed below is/are components of the pigmented layer of the retina? 1. amacrine cells 2. bipolar cells 3. cones 4. epithelial cells 5. rods -1, 2 -1, 2, 4 -2, 3, 5 -3, 5 -4

-4

Cones -outnumber rods. function only at low light levels. -allow color vision. -are concentrated at the periphery of the retina. -are most critical for night vision.

-allow color vision.

Which of the following are responsible for producing new olfactory receptors? -Bowman's glands -basal cells -supporting cells -olfactory bulbs

-basal cells

The hair cells responsible for hearing are located on the ________; their hair bundles are embedded in the ________ -tectorial membrane; tympanic membrane -tympanic membrane; basilar membrane -basilar membrane; tectorial membrane -vestibular membrane; tectorial membrane -basilar membrane; vestibular membrane

-basilar membrane; tectorial membrane

The point of greatest visual acuity is the -optic disk -utricle -optic chiasm -central fovea

-central fovea

Which is NOT part of the vascular tunic of the eye? -ciliary process -ciliary body -ciliary ganglion -ciliary muscle -iris

-ciliary ganglion

Which of the following structures is correctly matched with its layer of the eyeball? -ciliary muscle; vascular -optic disc; fibrous -iris; inner -sclera; retina

-ciliary muscle; vascular

There are two structures of the eye which help to focus light on the retina. They are the -iris and cornea -optic disc and lens -cornea and lens -choroid and iris

-cornea and lens

Which structure within the ampulla contains hair cells that are involved in dynamic equilibrium? -cupola -macula -otolithic membrane -crista -vestibular apparatus

-crista

When considering the arrangement of rods and cones in the retina, there is a central location where only cones are found. As we move farther away from this point there are increasing amounts of rods and fewer cones so, as some point we are only able to see black and white. This central location of only cones is known as the -choroid -fovea centralis -posterior chamber -optic disc

-fovea centralis

Axons of which cells make up the optic nerve? -rods and cones -bipolar cells -amacrine cells -ganglion cells -none of these choices

-ganglion cells

The aqueous humor -develops during the embryonic period and is not replaced. is found only in the posterior chamber of the eye. -accumulates "floaters" as a person ages. -nourishes the cornea and the lens. -holds the retina against the choroid.

-nourishes the cornea and the lens. (vitreous body - holds retina against choroid)

The most common type of color blindness is -red-blue color blindness -red-green color blindness -blue-green color blindness -total color blindness

-red-green color blindness

There is a white outer covering of the eye known as the -sclera -conjunctiva -cornea -choroid

-sclera

The blind spot is the area where -there are more rods than cones -there are more cones than rods -the optic nerve exits the eye -the iris attaches to the cornea

-the optic nerve exits the eye

An age-related change where an individual has a ringing sensation in the ears is called: -presbyopia -cataracts -presbycusis -tinnitus -glaucoma

-tinnitus

What is the function of the iris? -to control the amount of light entering the eye -to provide nutrients to the posterior retina -to focus light on the retina -to convert light to an action potential

-to control the amount of light entering the eye

Which of the following statements is correct? -Bowman's glands are located in connective tissue beneath taste buds. -Taste buds are found only on the tongue -A gustatory hair is a microvillus projecting from each gustatory receptor through a taste pore. -Supporting cells are squamous epithelial cells of the mucous membrane lining the nose. -Gustatory receptor cells have a life span of 60 days

A gustatory hair is a microvillus projecting from each gustatory receptor through a taste pore.

The optic chiasm is a complete decussation of the left and right optic nerves. True False

False - only partial decussation occurs

Which of the following pathways is the correct olfactory pathway? -Olfactory hairs on olfactory receptors are stimulated by an odorant molecule; the impulse travels to olfactory nerves; it moves through olfactory bulbs to the primary olfactory area of the cerebellum. -Olfactory hairs on olfactory receptors are stimulated by an odorant molecule; the impulse travels to olfactory nerves; it moves through olfactory bulbs to the primary olfactory area of cerebral cortex (orbitofrontal area of the frontal lobe). -Olfactory hairs on olfactory receptors are stimulated by an odorant molecule; the impulse travels to the medulla; it then through olfactory bulbs to the primary olfactory area of cerebral cortex (orbitofrontal area of the frontal lobe).

Olfactory hairs on olfactory receptors are stimulated by an odorant molecule; the impulse travels to olfactory nerves; it moves through olfactory bulbs to the primary olfactory area of cerebral cortex (orbitofrontal area of the frontal lobe).

Which of the following is a TRUE statement? -Cone pigments regenerate much more slowly than rod pigments. -Rhodopsin absorbs blue and green light, retinal absorbs orange and red light, and opsin absorbs yellow light. -Rods are involved in color vision. -Rods contain three different kinds of photopigments, each of which absorbs light at different wavelengths. -The retina contains three different types of cones, each with a different kind of photopigment.

The retina contains three different types of cones, each with a different kind of photopigment.

Sound waves are converted to mechanical energy and transmitted to the inner ear. True False

True

The lacrimal apparatus assist in protecting cleaning, lubricating, and moistening the eyeball. True False

True

Vestibular input into the cerebellum provides us with conscious awareness of the position and movements of the head. True False

True

The thin, protective mucous membrane composed of nonkeratinized stratified squamous epithelium with numerous goblet cells that is supported by areolar connective tissue is known as the... -tarsal plate -chalazion -lacrimal caruncle -conjunctiva

conjunctiva

Cataracts refer to loss of transparency of the ___. -lens -cornea -sclera -vitreous body

lens

Which of the following is not a primary taste sensation? -sweet -salty -pungent -bitter

pungent

Which of the following does not pertain to the lacrimal apparatus? -tears are produced by the sebaceous glands -tears contain a bactericidal enzyme -tears exit the eye vicinity via two small lacrimal puncta -lacrimal fluid ultimately ends up in the nasal cavity -lacrimal ducts empty tears onto the conjunctiva of the upper lid

tears are produced by the sebaceous glands (produced by lacrimal glands)