A&P1 Lab 11: general senses and special senses (olfaction and gustation)

mechanoreceptors

detect mechanical force (touch, pressure, vibration, stretch)

thermorecptors

detect temperature change

proprioceptors

Sensory receptors found in muscle and tendons that detect their degree of stretch

photoreceptors

detect light

Chemoreceptors

detect chemicals

nociceptors

detect potentially damaging stimuli as pain

Pacinian corpuscles

respond to deep pressure and vibration

meissner's corpuscles

light touch receptors

free nerve endings

detect temperature, chemicals, pressure, and pain

cribiform plate of ethmoid

h

what is the function of the cribiform plate?

allows passage of the olfactory nerves

olfactory nerve filaments

4

olfactory cilia

olfactory receptor cell

f

olfactory epithelium

c

supporting cell

n

circumvallate papillae

gustation cell

filiform papillae

taste hairs

c

taste buds

fungiform papillae

taste pore

what three nerves monitor gustation?

Facial Nerve, glossopharyngeal nerve, and vagus nerve

what area does the facial nerve serve for gustation?

anterior 2/3 of the tongue

what area does the glossopharyngeal nerve serve for gustation

the posterior 1/3 of the tongue

what area does the vagus nerve serve for gustation?

the epiglottis

What are the 5 categories of taste perception?

sweet, salty, sour, bitter, umami

what chemical group/substance is responsible for producing the sweet sensation?

sugars, saccharine, some lead salts, some amino acids

what chemical group/substance is responsible for producing the sour sensation?

acids- their hydrogen ions in solution

what chemical group/substance is responsible for producing the salty sensation?

metal ions, sodium (Na+)

what chemical group/substance is responsible for producing the umami sensation?

amino acids, glutamate, aspartate

what chemical group/substance is responsible for producing the bitter sensation?

alkaloids, caffeine, quinine, aspirin

what is the function of the circumvallate papillae