Ch 18 Lec 2 - General & Special Senses Flashcards
chemoreceptors monitor chemical composition of body blank
fluids
respond to substances dissolved in surrounding fluids
chemoreceptors
chemoreceptors are found inside the CNS and the blank
medulla
chemoreceptors are found in these two bodies
aortic, carotid
sense of smell
olfaction
olfactory organ is located within the blank cavity on either side of nasal septum
nasal
olfactory organ covers the blank of the ethmoid
cribriform plate
olfactory organ made up of olfactory blank
epithelium
three things in the olfactory epithelium
olfactory receptors, supporting cells, basal cells
olfactory cells are covered in secretions from blank
olfactory glands
olfactory receptors are highly modified blank neurons
bipolar
olfactory receptors have blank that extend into mucus secreted by olfactory glands
cilia
odorous particles dissolve into mucus and cause blank
depolarization
olfactory nerve does not go through blank
thalamus
smells can trigger blank
strong emotion
smells are interpreted in blank and blank lobes
temporal, frontal
there are blank primary smells
fifty
olfactory cells adapt blank
quickly
olfactory cells can blank but blank with age
reproduce, decrease
combinations of 50 primary smells allow us to distinguish blank of smells
thousands
taste sense
gustation
chemoreceptors in structures called blank in taste
taste buds
taste buds on superior surface of tongue in blank
papillae
epithelial projections where taste buds lie
papillae
three types of papillae
filiform, fungiform, circumvallate
there are about blank gustatory cells per taste bud
40
these replace receptors every 10 to 12 days
basal
gustatory cells extend blank called a taste hair into a taste pore
microvilli
gustatory pathway uses cranial nerves blank blank and blank
VII, IX, X
gustatory pathway has blank fibers that synapse with blank in medulla
afferent, nucleus solitarius
gustatory pathway goes to blank and blank
thalamus, cerebral cortex
primary tastes
sour, sweet, salt, bitter, water, umami
external structure supported elastic cartilage of external ear
auricle
canal to middle ear
external acoustic meatus
external ear ends at blank
tympanic membrane
these make wax in the external acoustic meatus
ceruminous glands
there are also blank in the external acoustic meatus
hairs
two functions of external ear
protect middle/inner ear, limit microorganism growth, funnel vibrations, deny access to foreign objects
middle ear consists of the blank which is an air filled space between external and inner ear
tympanic cavity
part of middle ear that can be induced by chewing or yawning
auditory tube
auditory tube allows for blank to get in and cause ear infection
microbes
most ear infections occur in the blank
middle ear