chapter 17 — special senses Flashcards
a normal, relaxed inhalation carries about ___% of the inhaled air to olfactory organs
2%
destruction to your left glossopharyngeal nerve would result in….
reduction in the ability to identify sour and bitter foods
taste buds are monitored by which cranial nerves?
7, 9, 10
facial, glossopharyngeal, vagus
stimulation of nocireceptors within the trigeminal nerve might produce a perception of…
peppery hot
a patient who experienced head trauma has lost the ability to taste spicy food. you should expect damage to cranial nerve ____
V (trigeminal)
name the primary tast sensations (order from back to front of tongue)
umami
sour
bitter
salty
sweet
what taste is triggered by glutamate
umami
what produces aqueous humor
the ciliary body
what structure changes the shape of the lens for near and far vision
the ciliary body
fibrous tunic is composed of…
cornea, sclera, and limbus
vascular tunic is composed of…
choroid, ciliary body, iris
what muscles control the shape of the lens
the ciliary muscles
in the human eye, most refraction occurs when light passes through the…
cornea
the ciliary muscles CONTRACT to adjust the shape of the lens for ___vision
near
a ray of light entering the eye will encounter the following structures in which order
conjunctiva, cornea, aqueous humor, lens, vitreous body, retina
trace the circulation of aqueous humor from the site of production to the site of where it is reabsorbed
produced at — ciliary body
reabsorbed at: canal of schlemm
ciliary body, posterior chamber, pupil, anterior chamber, canal of schlemm
a sudden increase of light into the eye would cause…
contraction of the sphincter pupillary muscles
is more neurotransmitter released in the dark or when a rod is hit with light?
in the dark
3 types of cones
red blue green
which cell of the retina produces an action potential that goes to the brain?
ganglion cell
what is the FIRST STEP in the process of photoreception
absorption of a photon by a usual visual pigment
the _____ convey(s) information about head position with respect to gravity
utricle and saccule
what are otoliths
tiny weights necessary for the static sense of equilibrium
the senses of EQUILIBRIUM AND HEARING are provided by receptors in the…
organ of corti
