Physiology Neurophysiology (22%) Flashcards
On an dendrite this is where the NT are stored
Telodendria
During the depolarization stage, what makes the neuron more positive
Na
The neuron becomes more permeable to Na
During repolarization, these channels start to widen
Potassium
During repolarization, these channels start to close
Sodium
What happens during repolarization
- Na channels being to close
- K chnnels begin to widen
- K flows to exterior
- Re establishes normal resting potiential
What are the two gates called in the voltage gate channels
Activation
Inactivation
Activation gate is on which side of the channel
outside
When the membrane potenital is -50 to -70, which gate opens and what comes through it
Activation gate
Na
(Inactivation gate will close when resting memebrane potential is met)
What are the excitatory NT
Norepinephrine
Glutamate
Nitric Oxide
This summation is invovled in multiple presynaptic bulbs
Spartial Summation
This summation is invilved in a single presnatpic bulb
Temporal Summation
What are the two mechanoreceptors called
Krause (Pressure)
Ruffinni (pressure and Temperature)
This mechanorecptor is general touch
Merkel’s Disc (not encapsulated)
What tract does Merkel’s Disc go through
Anterior Spinothalamic
This mechanoreceptor is fine touch
Meissner’s Corpuscles
What tract does Messner’s go through
Dorsal Columuns
This touch mechanoreceptor is associated with pressure and vibration
Pacinian Corpuscles
The NT associated with Parasympathic
AcH
The NT associated with Sympathetic
Pre: AcH
Post: Epi
NoRep
What is the word associated with a influx of Na
Depolarization
What is the word associated with Effluc of K
Repolarization
When no AP possible
Absoulte Refractory
An AP is available with increase potential
Relative Refracotry
The functions of the postcentral gyrus
Somatosensory
