Flashcards in Set 17 Physiology Deck (28):
What causes depolarization?
an influx of sodium
What causes repolarization?
efflux of potasium
When is the resting state?
before AP begins
What is the membrane potential during the resting state?
When is the depolarization stage?
Na+ makes inside more positive
What is the membrane potential during the depolarization state?
What is the outside gate of the sodium channel called?
What is the inside gate of the sodium channel called?
Which gate of the sodium channel closes more slowly?
When does the inactivation gate reopen?
when membrane potential is at or nearly at resting membrane potential
What does a presynaptic neuron do?
send the signal
What does a post synaptic neuron do?
receive the signal
What are most synapses?
axodendritic, from axon to dendrite
Where are gap junctions common?
visceral, smooth, and cardiac muscles
What is synaptic delay?
Are chemical synapses one way or two way?
What are the excitatory transmitters?
norepinepherine, glutamate, and NO
What are the inhibitory transmitters?
ACh, dopamine, glycine, GABA, and serotonin
What are demyelinating diseases?
MS, PLS, and ALS
What do nocieceptors sense?
pain, tickle, itch, and temp
What are the two types of mechanoreceptors?
Krause and Ruffini
What do Krause receptors monitor?
pressure, encapsulated mechanoreceptor
What do corpuscles of ruffini monitor?
temperature, pressure, encapsulated and multi branched mechanoreceptor
What are the touch receptors?
Merkel's discs, Meissner's corpuscles, and Pacinian corpuscles
What do Merkel's discs monitor?
general touch, non-encapsulated
What do Meissner's Corpuscles monitor?
fine touch, located on non-hairy skin, encapsulated
What do Pacinian corpuscles monitor?
pressure, vibration, encapsulated