Hearing, Balance, Taste and Smell Cont... Flashcards
like hearing, our sense of balance is the product of the inner ear and is called the …
vestibular system
three fluid-filled tubes adjacent to the cochlea
semicircular canals
the … contains stereocilia (receptors) that move when the head moves, producing action potentials
ampulla
the canals are oriented in three planes of head movement:
- nodding up and down (pitch, y-axis)
- shaking side to side (yaw, z-axis)
- tilting left or right (roll, x-axis)
the tongue detects five basic tastes:
salty
sour
sweet
bitter
umami
combination of taste and smell
what is flavor?
on the tongue increase surface area
papillae
- circumvallate
- foliate
- fungiform
three kinds of taste papillae
each papilla holds multiple taste buds, each of which consists of 50-150 …
taste receptor cells
each taste cell is sensitive to just one of the 5 basic tastes, with a lifespan of only …
- all areas of tongue detect all 5 tastes
10-14 days
sense of smell:
the sense of smell starts with receptor neurons in the nose:
olfaction
olfactory epithelium
the inability to smell
anosmia
are inhaled molecules that interact with olfactory cilia on the dendrites
odorants
just know this!
incredible diversity of receptor subtypes; die and are replaced in adulthood
- smell is the only sense that does not send info through the thalamus
once at a receptor cell, odorants interact with receptors on the cilia. The axon of the receptor cell terminates on a specific … in the olfactory bulb, which receives information from one specific class of odorant receptors
glomerulus
