senses Flashcards
sensation
process initiated by stimuli acting on receptors
perception
conscious awareness of those sensations
general senses
receptors distributed over a large part of the body
aps called generator potentials that travel to brain
general somatic
info about body and the environment
touch, pressure, temp, proprioception and pain
general visceral
info about internal organs
pain and pressure
special mechanism of action
receptors produce receptor potential that receptor releases a neuro transmitter that binds to receptors on membrane of neuron and then travels to brain
special senses
smell, taste, sight, hearing, balance
receptors based on stimuli they detect (5)
mechanoreceptors
chemoreceptors
thermoreceptors
photoreceptors
nocicirecptors
receptors based on location
cutaneous
visceoreceptors
propiorecptors
mechanoreceptors
mechanical force
compression, bending, stretching propioception, balance hearing
chemoreceptors
smell and taste
chemicals attach to receptors
thermoreceptors
change in temperature
photoreceptors
light–vision
nocioreceptors
extreme mechanical, chemo or thermal stim
PAIN
more than one stimuli
cutaneous
provide info about external environment
associated with skin
viseroreccptors
associated with pain
propiorecptors
joints tendons
associated with stretch
free nerve endings
simplest, most common
throughout body
cold (way more than warm)
warm
and pain–from both warm and cold
merkle disks senses
light touch and superficial pressure
merkle disks characteristics
axonal branches end as flattened expansions
basal layer of epidermis
in dome shaped mounds of epidermis in hairy skin
hair follicles
light touch
not localized bc areas overlap
Pacinian (lamellated)
deep touch; vibration, propioception of joints
deep dermis or hypodermis
single dendrite extends to eachother
meisner
two point discrimination; used to determine texture
in dermal papillae
numerous and close together on tongue and finger tips
ruffini end organ
continuous touch
primarily in dermis of fingers
