Chapter 8 Vocab

respond to touch, pressure, temperature, and pain

respond to smell, taste, vision, and equilibrium

a sensory nerve cell activated by chemical stimuli

receptors that are sensitive to mechanical pressures such as touch, sound, and labor contractions

sensory receptors that respond to heat/cold and are sensitive to body temperatures

specialized receptors that respond to light energy and are found in the human retina

free, unspecialized nerve endings that bring info from the external environment to the brain

occurs in visceral tissues such as the heart, lungs, and intestines

feels as though it is coming from a different body part

originates from the skin and usually stops when the stimulus stops

a dull, aching sensation

responds to sugars, some amino acids, and lead salts

responds to acidic hydrogen ions

responds to metal ions in solution

responds to alkaloids

responds to the amino acid glutamate for the taste savory

tympanum

connects the middle ear to the back of the throat and helps maintain air pressure

communicating chambers and tubes in the inner ear

provide a sense of equilibrium

covers and protects the eye

the covering around the eye and under the eyelids

produce tears and drain into the nasal cavity; the largest set of eye glands; moisten and lubricate the eye surface

the 6 muscles that move the eyeball

the transparent part of the eye that focuses light rays

a continuation of the cornea that goes towards the back of the eye

exits the optic disc and transmits visual information to the brain

the colored portion of the eye

an opening for light to enter in the eye

visual receptor cells