W6 Nervous System CNS + senosry transduction Flashcards
(30 cards)
what is signal transduction
conversion of environmental factors into neural info
what does mechanoreception detect
pressure
sound
gravity
what does Thermoreception detect
temp
what does Photoreception detect
electromagnetic waves
what does Chemoreception detect
molecules
what does nociception detect
cellular dmg
what are the cutaneous receptors for
detecting pressure
how do pacinian corpuscles work
pressure opens Na+ channels and an influx of Na+ depolarises the membrane
what is propprioception
stretching of muscles to activate muscle spindles
what are Pacinian corpuscles and muscle spindles exmaples of
direct stim of sensory neurons
how do hair cells help hear
modified epithelial cells with cilia with kinocilioum bends from sterocilia and opens K+ channels
how is acceleration and gravity detected
movement of kinocilioum and sterocilia
position of otoliths
what type of stimulation of neurones are hair cells
indirect
what is stimulus modality
how info is processed by receptors
what is stimulus location
where the sensor got the stimulus from
what is stimulus intensity
higher freq of APs when stronger stimulus intesnity
how do tonic and phasic receptors adapt for stimulus duration
tonic = slow
phasi = fast
where does most sense of touch go to in the brain
postcental gyrus
what are the 4 functions of glial cells
surround neurons and hold them in place
supply nutrients and O2 to neurones
insulate neurones
kill pathogens and dead neurones
what does the medulla control
breathing and heartrate
what are the 4 lobes of the brain
frontal
parietal
temporal
occipital
what does the frontal lobe do
planning and determines patterns in memory
what does the parietal lobe do
ability to interpret sensations
where is the postcentral gyrus found
pareital lobe
