A&P senses
The semicircular canals
allow a person to detect movement in all directions.
The lens
focuses light on the retina.
The most sensitive taste buds are found in _____ papillae.
foliate
Depth perception
is the ability to distinguish between near and far objects and judge their distance.
The blink reflex is designed to
keep the eyes moist.
Light refracts as it passes through the
lens, cornea and humors of the eye.
The outermost tunic of the eyeball is the
sclera.
Vision is dependent upon
photoreceptors
Which of the following special senses is relayed directly to the cerebral cortex without going to the thalamus?
smell
Which of the special senses contains receptor neurons that are the only nerve cells in direct contact with the outside environment?
smell
The cornea
is part of the focusing system of the eye.
The lacrimal glands
constantly produce a fluid called tears.
The ability to detect simultaneous stimulation at two points on the skin is called two-point discrimination.
True
When a person is exposed to temperature extremes, why is it difficult to distinguish hot from cold objects?
At extremes, pain receptors are stimulated by both very hot and very cold objects.
Which of the following statements is false?
Sensitivity of taste buds for sweet taste is very high.
Why does a person's nose run when he cries?
Tears drain into the nasal cavity via the nasolacrimal duct.
Night blindness could be caused by
a lack of rhodopsin.
Increased fluid accumulation in the cornea would result in
a scattering of light rays.
Decreased sensitivity to a continued stimulus is called
adaptation
To which colors are the three different kinds of cones sensitive?
red, blue, and green
In order for a molecule to be detected by the olfactory neurons, it must
be dissolved in fluid covering the olfactory epithelium.
Cochlear neurons are stimulated by
bending microvilli or stereocilia on the hair cells.
The transparent mucous membrane that covers the anterior white surface of the eye is the
bulbar conjunctiva.
Changes in the blood concentration of glucose, oxygen and hydrogen are detected by
chemoreceptors
Mechanoreceptors respond to
compression of receptors.
Pinkeye is an acute inflammation of the
conjunctiva
The transparent anterior portion of the sclera is the
cornea
Pacinian corpuscles respond to
deep cutaneous pressure and vibration.
The pigmented layer of the retina
enhances visual acuity and reduces scattering of light.
The auditory tube
equalizes air pressure between the middle ear and outside air.
Palpebrae is another name for the
eyelids.
Visceroreceptors are receptors associated with joints, tendons, and other connective tissue. True False
false
Taste buds are not associated with _____ papillae.
filiform
The area of greatest visual acuity is the
fovea centralis.
Rapid changes in altitude can rupture the eardrum. Symptoms that may occur include
hearing impairment.
Vitreous humor
helps to hold the lens and retina in place.
Which portion of the ear contains the sense organs for hearing and balance?
inner ear
The contractile structure that surrounds the pupil is the
iris.
Color vision
is a function of cone cells.
The position of the head with respect to gravity is determined by the
movements of otoliths in response to gravity.
Blood vessels enter the eye and nerve processes exit the eye at the
optic disc.
The sensory cells for hearing are located in the
organ of Corti or spiral organ.
Rapidly adapting proprioceptors that provide information on the location of a moving hand are known as
phasic receptors.
Which of these combinations of general senses depends on mechanoreceptors?
pressure and proprioception
The attenuation reflex
prevents damage to delicate ear structures.
The ability to localize the position of body parts is called
proprioception
The perception of position and movement of body parts is
proprioception
When rhodopsin is exposed to light,
retinal separates from opsin.
Which of the following is (are) associated with the retina?
rods and cones
Rhodopsin is found in the
rods.
The utricle and saccule are involved in
static balance.
Sensory structures that detect taste are
taste buds.
A ringing in the ears is considered
tinnitus
Slowly adapting proprioceptors that would let you know the position of your thumb without looking at it are known as
tonic receptors
Which of the following is a somatic sense?
touch
The malleus, incus, and stapes
transmit vibrations from the eardrum to the oval window.
The simplest and most common type of sensory nerve endings are free nerve endings. True False
true
The external ear terminates at the
tympanic membrane.
Tears
wash foreign objects away from the eye.