Human Bio 102 Ch 9 Senses

The shape of the lens of the eye can be changed to allow focusing on certain objects at different distances from the head. The structure that produces this shape change is the ________. A) ciliary body B) eyelid muscle C) extrinsic muscle D) papillary muscle

A) ciliary body

Color blindness usually results from a decrease in the number of A) cones. B) foveae. C) optic disks. D) ciliary muscles. E) rods.

A) cones

Lewis had a hereditary disorder that caused his cochlear hair cells to progressively die, beginning with those nearest to the oval window and then on to the rest of the hair cells. What will be the earliest problem noticed? A) anosmia B) high-frequency deafness C) color blindness D) vertigo

B) high-frequency deafness

Mina had a throat infection; in a few days it had spread to her ear. What part of her ear would be affected first? A) pinna B) middle ear C) inner ear D) external auditory canal

B) middle ear

The white portion of the tough outer coat of the eye is called the ________. A) retina B) sclera C) choroid D) ciliary body

B) sclera

The area where the optic nerve leaves the retina and where photoreceptors are absent is called the ________. A) cornea B) fovea C) optic area D) blind spot

D) blind spot

Which one of the following conditions results when the transparency of the lens decreases? A) glaucoma B) retinal detachment C) color blindness D) cataracts E) astigmatism

D) cataracts

The correct sequence of sound waves in the ear is ________. A) auditory tube > incus > malleus > stapes > eardrum B) stapes > eardrum > malleus > oval window C) eardrum > stapes > incus > malleus > inner ear D) malleus > incus > stapes > oval window

D) malleus > incus > stapes > oval window

Olfactory receptors are located in which one of the following? A) skin surrounding nasal openings B) taste buds C) upper regions of mouth D) upper part of nasal passages E) muscles

D) upper part of nasal passages

An insufficient number of particular types of cones causes A) detachment of the retina. B) macular degeneration. C) impaired night vision. D) glaucoma. E) impaired color vision.

E) impaired color vision.