A&P The Somatic Nervous System Ch. 14

taste and smell

The chemical senses are

Sclera

the white of the eye

eardrum

tympanic membrane

lacrimal gland

produces tears

olfaction

sense of smell

Gustation

sense of taste

general sense of touch

somatosensation

raised bumps within the structures of the papillae

taste buds

audition

hearing

3 small bones in the middle ear

malleus, incus, stapes

Where does the active molecule capsaicin come from?

hot peppers

What medicinal use does capsaicin have?

pain reliever

cochlea

responsible for hearing

Where are the sound waves transduced into a neural signal?

inner ear

vestibule

responsible for balance

Head movement is sensed by the

semicircular canals

Vision

the special sense of sight that is based on the transduction of light stimuli received through the eyes

Cones

photoreceptors that are more sensitive to bright light and color

Cornea

the fibrous covering of the anterior region of the eye that is transparent so that light can pass through it

Iris

Colored part of the eye

Rods

photoreceptors that are more sensitive to low light levels

pupil

hole in the center of the eye that allows light to enter

The watery fluid found in the anterior and posterior cavities of the eye:

aqueous humor and vitreous humor

Retina

innermost layer of the eye; contains the nervous tissue responsible for photoreception

Eustachian tube

A narrow tube between the middle ear and the throat that serves to equalize pressure on both sides of the eardrum