Neural Impulse

Question 1

Resting Potential

Answer 1

when a neuron is not firing a neural impulse it is inactive and has a stable negative charge (-70 millivolts) in this state it generates action potential

Question 2

Action potential

Answer 2

shift in neurons electrical charge, created when enough neurotransmitters are received to cross the threshold required to trigger a neural impulse

Question 3

Depolarization and Repolarization

Answer 3

• De: positive sodium ions enter the neuron causing a reversal of electric charge from negative to positive allowing for action potential
• Re: returns to negative charge (resting state)

Question 4

All or Nothing Priniciple

Answer 4

neuron will always fire at the same intensity (100%)

Question 5

Reuptake

Answer 5

when neurotransmitters in the synapse are reabsorbed by the firing neuron

Question 6

Absolute Refractory Period

Answer 6

After action potential, the time another one cannot begin “recharging phase of 1-2ms”
-nerve will not fire, until after refractory period is over and returns to resting potential