Neuron parts and Functions
Dendrite
Receives neural messages and sends impulse to cell body
Acetylcholine (ACh)
Enables muscle action, learning, and memory.
Resting Potential
Positive ions (sodium) on the outside and negative on the inside (proteins)
Cell Body
contains the nucleus
Dopamine
Influences movement, learning, attention, and emotion.
Define polorization
sends electrical pulses down axon
Axon
passes messages through its branches to other neurons, muscles, or glands
Serotonin
Affects mood, hunger, sleep, and arousal.
Action Potential
"Nerve impulse"- causes the neuron to fire
Axon terminal
Form junctions with other cells
(The end of an axon)
Norepinephrine
Helps control alertness and arousal.
Depolorization
Sodium (+Na) ions come in and depolarize (neutralize) section of axon
Myelin sheath
covers axon of neurons and helps speed neural impulses
Glutamate
A major excitatory neurotransmitter; involved in memory.
Refraction period
Potassium (+k) ions are pushed out and neuron "pauses to reload"