UMHB A&P1 LAB

amino acids

umani

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

mechanoreceptors

detect light energy

Photoreceptors

detect chemicals

Chemoreceptors

detect potentially damaging stimuli as pain,

Nociceptors

sugars, fructose, sucrose, and glucose

Sweet

Na+

salty

hydrogen ions (acids)

Sour

alkaloids (ex. caffeine)

bitter

carry sensations of fast pain

myelinated type A fibers (nociceptors)

carry sensations of slow pain

Unmyelinated type C (nociceptors)

monitor the position and movement of muscles and joints

Proprioceptors

detect pressure changes

Baroreceptors

provide sensations of touch, pressure, and vibration

Tactile receptors

detect temperature, chemicals, pressure pain; most dense in epithelial & connective tissues

Free nerve endings

light pressure, dermal papillae of hairless skin

Meissner's corpuscles

deep pressure, dermis, hypodermis, tendons, ligaments, and joints

Pacinian corpuscles

a change in sensitivity in the presence of a constant stimulus, receptor discharge slows and conscious awareness declines

Adaptation

olfactory epithelium

cribriform plate

1

olfactory cilia

olfactory receptor cell

J

supporting cell

2

Circumvallate papillae

gustatory cell

filiform papillae

fungiform papillae

taste hairs

4

taste buds

anterior 2/3 of tongue transmit information to medulla oblongata

Facial nerve

posterior 1/3 and pharynx transmits information to medulla oblongata

glossopharyngeal nerve

epiglottis, transmits information to medulla oblongata

vagus nerve