Ch 18 Lec 1 - General & Special Senses Flashcards
two sensory receptors
tonic, Phasic
a specialized cell that sends sensations to CNS
sensory receptor
sensory receptor that is always sending signals to CNS
tonic
sensory receptor that becomes active only with changes in the conditions they monitor
Phasic
five types of receptors
chemoreceptors, nociceptors, thermoreceptors, mechanoreceptors, photoreceptors
area monitored by a single receptor cell
receptive field
each receptor responds to a specific stimulus which is called blank
receptor specificity
a photoreceptor will not respond to a blank stimulus
chemical
the sensory information arriving at the CNS
sensation
conscious awareness of sensation
perception
blank interprets impulses
brain
perception is the feeling that occurs when blank impulses are interpreted
sensory
occurs when sensory receptors are subjected to blank stimulation
continuous
sensory adaptation results in a reduction of blank
sensitivity
when sensory receptors decrease their level of activity
peripheral adaptation
two receptors of peripheral adaptation
fast adapting, slow adapting
sensory adaptation where sensory neurons are still active and CNS causes reduced perception
central adaptation
sensory information from receptors is blank
incomplete
humans do not have blank for every blank
receptor, stimulus
receptors have limited blank
ranges
stimulation of a sensory receptor requires a blank event that is interpreted
neural
these senses do not have specialized receptor cells or sensory organs
general senses
can have specialized receptor cells separate from the sensory neuron
special senses
special senses are structurally blank
more complex
special senses are usually in special blank
organs
three groups of general senses
exteroceptors, proprioceptors, interoceptors
general sense group that relays info about external environment
exteroceptors
general sense group that depict body position in space
proprioception
these receptors sense tissue damage
nociceptors
nociceptors perceive blank
pain
nociceptors are blank nerve endings with large receptive field
free
nociceptors are found everywhere except blank
brain
nociceptors provide a blank function
protective
nociceptors do not blank well
adapt
three types of pain
fast, slow, referred
prickling pain that is quick and induces a reflex and usually ends when stimulus ends
fast pain
type of pain that is burning and begins later, persists longer, and is achy
slow pain
type of pain that is visceral pain that feels like it is coming from a more superficial region
referred pain
example of a referred pain
brain freeze
referred pain is due to blank structures being innervated by the same blank nerves as the damaged viscera
superficial, spinal
pain in left arm before heart attack is blank pain
referred
receptors that involve heat and cold
thermoreceptors
thermoreceptors are free nerve endings in blank
skin
thermoreceptors are blank to adapt
quick
hot and cold is detected by blank but pain is detected by blank
thermoreceptors, nociceptors
six types of of tactile receptors in these two categories
unencapsulated, encapsulated
three types of unencapsulated tactile receptors
free nerve endings, root hair, tactile disc
unencapsulated tactile receptor that is in the papillary of dermis and is for general touch
free nerve endings
unencapsulated tactile receptor that monitors distoritions and movement across body surface
root hair
unencapsulated tactile receptor that is an expanded nerve terminal that synapses with Merkel cell and is sensitive to fine touch
tactile disc
three encapsulated tactile receptors
tactile corpuscles, lamellated corpuscle, ruffini corpuscle
encapsulated tactile receptor that is found where tactile sensitivities are very well developed
tactile (meissner’s) corpuscles
encapsulated tactile receptor that responds to deep pressure
lamellated (Pacinian) corpuscle
encapsulated tactile receptor that is in dermis and detects pressure with little adaptation
ruffini corpuscle
stretch receptors that monitor changes in pressure and detect stretching of tissue walls
baroreceptors
baroreceptors regulate blank activities
autonomic
two autonomic activities regulated by baroreceptors
digestive tract, bladder, carotid sinus, lung, colon
receptors that monitor position of joints, tension in tendons, state of muscle contraction
proprioceptors
proprioceptors have blank adaptation to stimulus
no
two types of proprioceptors
muscle spindles, golgi tendon organ
muscle spindle proprioceptors monitor blank of muscle
length
golgi tendon organ proprioceptors monitors blank in a tendon during contraction
tension