Electrochemical impulse ❌ How electric current is generated in the body.

Action potential : ❌
The voltage difference across a nerve cell membrane when the nerve is excited.

Resting potential ❌
Voltage difference across a cell membrane during the resting stage

Unstimulated axon ✅

Stimulated axon ✅

Repolarization ✅

Depolarization ✅

Sodium-potassium pump ❌
Located in the cell membrane, an active transport method that moves sodium ions out of and potassium ions into a cell against their concentration gradient.

Polarized membrane ✅

Refractory period ✅

Threshold level ❌ Minimum level of a stimulus required to produce a response.

All-or-none response ❌ A nerve or muscle fibre responds completely or not at all to the stimulus.

Key: Check = I know, X = Don't know

Synaptic transmission ✅

Synapses ❌
Small spaces between neurons or between neurons and effectors.

Postsynaptic neuron ❌
Neuron that carries impulses away from the synapse.

Presynaptic neuron ❌
Neuron that carries impulses to the synapse.

Neurotransmitters ❌
Chemicals released from vesicles into synapses. Located in the end plates of axons.

Acetylcholine ❌
Neurotransmitter released from vesicles in the end plates of neurons, that makes the postsynapatic membranes more permeable to sodium ions.

Cholinesterase ❌
Enzyme, which breaks down acetylcholine, that is released from postsynapatic membranes in the end of plates of neurons shortly after acetylcholine.

Summation ❌ Effect produced by the accumulation of neurotransmitters from two or more neurons

Hyperpolarized ❌ A Condition when the inside of the nerve cell membrane becomes more negative than the resting potential.