Go on. Explore!

lvl 0 • 0 xp

lvl 1

Home Market Decks Interests

AP Biology Nervous System

memorize.ai (lvl 286)

(0)

25 cards

()

Section 1

Preview this deck

potassium

Front

1 / 25

Biology Science

0.0

0 reviews

5			0
4			0
3			0
2			0
1			0

Active users

All-time users

Favorites

Last updated

6 years ago

Date created

Mar 1, 2020

Cards (25)

Section 1

(25 cards)

potassium

Front

ion responsible for repolarization

Back

neuron

Front

main cell of the nervous system

Back

motor neuron

Front

sends impulses to muscles to create movement

Back

sodium

Front

ion responsible for depolarization

Back

threshold

Front

the voltage needed to open the voltage gated Na channels and start the unstoppable flow of Na into the cell, -55 mV

Back

node of Ranvier

Front

gap between myelin sheaths that expose the axon, help accelerate impulses

Back

myelin sheath

Front

insulates the axon and speeds transmission of the impulse

Back

action potential

Front

rapid change in the voltage between the membrane of a neuron in response to a stimulus

Back

dendrite

Front

receive stimuli; highly branched extensions

Back

synapse

Front

transmission of information is from one neuron to the next

Back

sensory neuron

Front

pick up stimuli from the environment and send to the brain

Back

synaptic vesicle

Front

hold the neurotransmitters in the presynaptic neuron

Back

interneuron

Front

neurons in the CNS that communicate internally and connect sensory to motor neurons; are responsible for reflexes

Back

postsynaptic receptor

Front

receive neurotransmitters and open Na gated ion channels to start another action potential

Back

axon

Front

conduct and propagate impulses

Back

sodium-potassium pump

Front

protein that uses active transport to move 3 Na out of the membrane and 2 K in, which resets the neuron to resting potential

Back

Schwann cell

Front

creates the myelin sheath

Back

cell body

Front

contains nucleus of the neuron

Back

ion-gated channels

Front

proteins responsible for allowing sodium or potassium to diffuse into or out of the axon

Back

undershoot

Front

because K channels are slow to close, the voltage reaches -80 mV, and causes the Na/K pump to reset the neuron

Back

repolarization

Front

Na channels close and K channels open, which allows K out of cell so the cell is more negative

Back

neurotransmitter

Front

molecule that neurons use in synaptic transmission

Back

refractory period

Front

period where the neuron resets using the Na/K pump before a neuron can be fired again

Back

synaptic cleft

Front

space between the pre and postsynaptic neurons

Back

depolarization

Front

the massive influx of Na causes the cell's voltage to become less negative, all the way up to 35 mV

Back