types of neurons etc.

Afferent Neurons

Carries sensory info to the brain

Efferent Neurons

Exit the brain; carries info out of the brain

resting potential

Neurons rests at a slightly negative charge

Depolarization

Excitatory Message attaches to the dendrites & the charge switches from slight negative to positive

Action Potential

Electrical Signal sent down the axon towards the waiting axon terminal buttons

All or None Principal

A neuron either fires of it doesn't

Refractory Period

Once a Neuron fires, it cannot immediately refire

Lock and Key system

Neurotransmitters released into the synapse can only attack to specialized receptors called dendrites of the next neuron

Agonist

drugs/chemicals that mimic the action of a neurotransmitter and amplify

Antagonist

drugs/chemicals that oppose the action of a nuerotransmitter