Parts of the Nervous System
It controls rest and digest response
Parasympathetic Nervous System
signal received from neighboring neuron; Na+ channels open; Na+ goes into the cell; inside of cell becomes positive compared to outside
de-polarization
mood neurotransmitter
serotonin
extensions from the neuron cell body that receive signals from other neurons
dendrite
It's the nerves that control your smooth/cardiac muscle (think unconscious movement)
Autonomic Nervous System
a change in the environment that causes a response
stimulus
pleasure neurotransmitter
dopamine
gaps between segments of myelin sheath that speed up signal transmission
nodes
It's the nerves that control your skeletal muscles (think voluntary movement)
Somatic
Na+ channels close; K+ channels open; K+ leaves the cell; inside of cell becomes negative compared to outside
repolarization
learning neurotransmitter
acetylcholine
chemical signal sent across the synapse from a presynaptic neuron to a postsynaptic neuron
It contains the brain and spinal cord
Central Nervous System
An electrical signal sent within a single neuron
action potential
euphoria neurotransmitter
endorphins
extension from the neuron cell body that conducts electrical signals away from the cell body
axon
It controls fight or flight response
Sympathetic
K+ channels close; Na+/K+ pump operates; resets resting membrane potential
undershoot/hyperpolarization
memory neurotransmitter
glutamate
gap between two neurons where information is passed from one neuron to another
synapse