Anatomy of a Neuron
another name for cell body
what is soma
potential that a neuron must reach for an action potential to be generated
what is threshold (-55mV)
The general kind of channel opens in response to the presence of a neurotransmitter
what is ligand gated ion channel
The two types of synapses
what is chemical and electrical
junction between a synaptic terminal and another neuron
what is synapse
type pf response an action potential is, because it occurs or it does not
what is all or none
the general kind of channel opens in response to a change in the membrane potential
what is voltage gated ion channel
the majority of synapses are this type
what is chemical
Conducts impulses away from the cell body to another neuron, muscle, gland
what is axon
closed channels at resting state
what is ion channel
the membrane protein uses ATP to restore concentrations of Na+ and K+ to their "resting" levels
what is Na-K pump
the most common excitatory neurotransmitter in the brain
what is glutamate
Receive stimuli and send signals to the cell body
what is dendrites
the process in which the membrane potential returns to its resting state
What is repolarization
A voltage-gated Na+ channel propagates the action potential by using this kind of feedback
what is positive feedback loop
this causes the release of neurotransmitter into the synaptic cleft
what is calcium
The insulating cover that axons of many neurons are surrounded by
what is myelin sheath
the level an axon depolarizes to in order to generate an action potential
what is (-55mV)
When this ion crosses the membrane through specific channels, the membrane potential becomes more negative
what is potassium
the five majors of neurotransmitters
what is "acetylcholine", "amino acid", "neuropeptides", "Biogenic amines", "gasses"