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Electrochemical Impulse :red_cross:, Synaptic Transmission :red_cross:,…
Electrochemical Impulse :red_cross:
Action Potential :red_cross:
It is the voltage difference across the nerve cell membrane when the nerve is excited
Resting Potential :red_cross:
Resting potential is similar to action potential except it is when the nerve is resting
Polarized Membrane :red_cross:
The resting membrane is said to be charged and is called a polarized membrane. It is charged by unequal amounts of positively charged ions inside and out side the nerve cell.
Depolarization :red_cross:
A rapid inflow of sodium that causes a charge reversal
Sodium Potassium Pump :check:
Repolarization :red_cross:
Restoring the original polarity of a nerve membrane
Refactory Period :red_cross:
The time that the nerve cell needs to repolarize before the next action potential can be conducted. Usually lasts 1-10 ms.
Synaptic Transmission :red_cross:
Synapses :red_cross:
Small spaces between neurons, or between neurons and effectors
Neurotransmitters :check:
Presynaptic Neuron :red_cross:
Neuron that carries impulses to the synapses
Postsynaptic Neuron :red_cross:
Neuron that carries impulses away from the synapses
Acetylcholine :red_cross:
An example of a neurotransmitter found in the end plates of many nerve cells. It makes postsynaptic membranes more permeable to Na + ions
Cholinesterase :red_cross:
Enzyme that breaks down acetylcholine. It is realeased from the postsynaptic membrane and destroys the acetylcholine.
Hyperpolarized :red_cross:
The rush of potassium out of the cell increases the number of positive ions outside the cell relative to the number found inside. These neurons are said to be hyperpolarized
Summation :red_cross:
The effect produced by the accumulation of neurotransmitters from 2 or more neurons
Threshold Level :red_cross:
All-or-None Response :red_cross:
Neurons fire completly or not at all
A critical amount of stimulus to get a response
Movement of the action potential :red_cross:
The movement of positively charged ions from the area of action potential to the adjacent areas of a resting membrane cause depolarization in the adjoining area. The disturbance causes sodium channels to open in the adjoining area of the nerve cell membrane and results in the movement of action potential
new connection
LEGEND: red =prediction, green =new