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48 Cards in this Set

  • Front
  • Back
detect change and generate impulses
Sensory Neurons
transmit impulses form receptors to CNS
Sensory tracts
White matter in the CNS
Sensory Area
Most in cerebral cortex
Fells & interprets the sensation
degree to which a sensation is felt
effect of a previous or simultanious sensation on a current sensation as the brain compares them.
becoming unaware of a continuing stimulus
sensation remains in the consciousness after the stimulus has stopped.
Location of sensory areas
Parietal lobes
Referred pain
Visceral pain felt as cutaneous pain
What sensations are in the dermis
Free nerve endings:pain,heat,cold
Encapsulated nerve endings:touch, pressure
Function of Streach receptors in Muscles
detect streaching
Location of sensory areas for Conscious muscle sense
Parietal Lobes
_______ uses unconsious muscle sense to coordinate voluntary movement
location of Chemoreceptors
taste buds on tongue
upper nasal cavity
Function of chemoreceptors
detect food in saliva in mouth/
detect vaporized chemicals
Four basic tastes
sweet, sour, salty, bitter
Location of receptors for Hunger
Function of receptors for hunger
detect changes in GI hormones and nutrient levels in the blood
Location of receptors for thirst
Function of receptors for thirst
detect changes in body water
eyelid and Eyelash function
keep dust out of eyes
Lacrimal gland function
produce tears
What protects Eyeball
bony orbit (socket)
how many muscles move the eyeball
six muscles
outermost layer of the eyeball
What is sclera made of
fibrous connective tissue
where is Choroid layer
middle layer of eyeball
Ciliary body and suispensory ligaments Function
changes shape of lens
what is Ciliary body and suispensory ligaments made of
a transparent, elastic protein
Iris function
regulate diameter of Pupil, how much light strikes the retina
Reina location
innermost layer of eyeball, contains rods and cones
Rods function
detect light
function of Cones
detect color
Vitreous Humor function
keeps retina in place
aqueous humor function
nourishes the lens and cornea
Outer ear function
Middle Ear location
eardrum at end of ear canal
Middle Ear function
vibrates when sound waves strike it
Auditory bones
malleus, stapes, incus
Auditory bones function
transmit vibrations to inner ear
Eustachian tube Function
allows air in and out of middle ear to permit eardrum to vibrate
Inner Ear
bony labyrinth in temporal bone
Membraneous structures
cochlea, utricle, saccule, & seicircular canals
snail-shaped, 3 internal canals, contains receptors for hearing
Utricle & Saccule
membranous sacs in the vestibule
Semicircular canals
3 membraneous ovals in 3 planes
Aortic Arch
aortic body contains chemoreceptors