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synapses

ends of axon which stimulate electrical activity

presynaptic neuron

first neuron in signal path which releases neurotransmitter. come in contact with dendrite, soma, or axon

postsynaptic neuron

second neuron which responds to neurotransmitter

synaptic cleft

gap between neurons

chemical synapses

how neurons communicate; by releasing chemicals

electrical synapses

exist in the cardiac and smooth muscle. has gap junctions which join adjacent cells. advantage is quick transmission. disadvantage cant turn off

synaptic knob

has synaptic vesicles which contains neurotransmitters

neurotransmitters

acetylocholine, amino acid neurotransmitters (GABA), monoamines (epinephrine, norepinephrine, dopamine) and neuropeptides (chains of 2 to 40 amino acids, gut brain peptides cause food cravings)

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