Bio Chapter 12 HW

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Whereas the sense of taste is based on ________ (how many?) classes of taste receptors, the sense of smell has over ________ (how many?) different receptors for chemicals associated with odor.

5, 1,000

Each of the following statements about cones is TRUE, EXCEPT which one?

Cones are evenly distributed throughout the retina, accounting for visual acuity.

Which of the following sequences represents the path by which sound waves travel through the ear?

External auditory canal, eardrum, oval window, cochlea

Which of the following statements about the human ear is true?

THE BRAIN INTERPRETS INPUT FROM DIFFERENT REGIONS of the basilar membrane as different pitches

Which one of the following occurs when bright light hits the eye?

The pupil decreases in size.

True or false. Sound waves that enter the human ear are transmitted in fluid only in the inner ear.

True

The loudness (intensity) of a sound is specifically associated with the

amplitude of the sound waves

Which of the following can be corrected with corrective lenses?

both myopia and hyperopia

Which one of the following conditions results when the transparency of the lens decreases?

cataracts

allow a person to taste food

chemoreceptors

The transparent covering of the front of the eye is the

cornea

Which of the following correctly traces the path of light through the eye?

cornea, aqueous humor, pupil, lens, vitreous humor, retina

The _____ is the region of the eye where photoreceptors are most highly concentrated.

fovea

During eye examinations, a test is done to monitor the pressure within the eye. This test is done to detect

glaucoma

location of the auditory nerve

inner ear

site of the vestibular canal and tympanic canal

inner ear

Pain receptors adapt slowly or not at all because __________.

lack of adaptation is important to survival

Nearsightedness and farsightedness are caused by the

length of the eyeball

The _____ changes shape to focus light on the retina.

lens

detect light touch of skin

mechanoreceptors

air-filled chamber in temporal bobe containing three small bones

middle ear

Which of the following receptors are MOST likely to demonstrate receptor adaptation?

olfactory receptors in the nose

sound waves moving through this area hit tympanic membrane

outer ear

respond to immediate, extreme heat or cold

pain receptors

respond to tissue damage

pain receptors

respond to light

photoreceptors

What name is given to the opening that allows light into the interior of the eye?

pupil

A more powerful stimulus will __________.

result in BOTH activation of more receptors and more frequent action potentials

The photoreceptors of the eye are __________.

rods and cones

What name is given to the tough layer that forms the "white" of the eye?

sclera

Receptor adaptation results when __________.

sensory neurons stop sending action potentials

As humans age, their ability to focus on nearby objects deteriorates. This is the result of

stiffening of the lens and loss of accommodation capability

Which of the following will regulate the amount of light entering the eye?

the iris

Receptors are classified according to __________.

the type of stimulus energy they convert


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