BY 124L - Lab 11: Nervous System and Sense

Mechanoreceptors

• Pacinian corpuscles

• Messiner's corpuscles

Pacinian corpuscles

onion shaped, pressure/sustained touch

Messiner's Corpuscles

light touch

Nocicerecptors - free dendrites

Pain receptors

Chemoreceptors

• Gustatory

• Olfaction

Gustatory

taste sensations

Olfaction

smell

thermoreceptor

• end bulb of Krause

• Ruffini's end organ

End bulb of krause

cold

Ruffini's end organ

heat

Proprioceptors

• Body position awareness in muscles

outer Ear

• helix is the big part

Middle ears

• have the ossicles, the intricate bones

• malleus, incus, stapes

• ear drum - tympanic membrane

internal ear

• cochlea

• hairs for pitches

shorter hairs

high pitches

longer hairs

low pitches

parts of the eye

• optic nerve

• retina

• sclera

• choroid

• cilliary muscle

• cornea

• pupil

• iris

• lens

opticn