Bio Chapter 12 HW
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
