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neurons/synaptic transmission - Coggle Diagram
neurons/synaptic transmission
structure of a neuron
types of neurons
sensory
carrys msgs from PNS-CNS
unipolar
transmits msgs
tells brain in/external environment from sensory receptors
appropriate reaction
impulses translated into sensations
long dendrites/ short axons
relay
common in cns
multipolar
send/recieve info from sources
sensory+motor neurons communicate and connect
carry nerve impulses to other neurons
carry msgs from one part of cns to another
short/stubby dendrites + axons
motor
form synapses w/ muscles + glands
release neurotransmitters
triggers response when muscle is stimulated
muscle contracts
strength of contraction dependent on nerve impulses
inhabition of neurons = muscle relaxation
multipolar
sends + transmits
connects cns to effectors
e.g muscle glands
short dendrites +long axons
process of synaptic transmisson
dendrites pick up message
neurotransmitters
sends action potential (impulse) through body
through cell body
axon
terminal buttons
AP arrives at TB
transferred to another neuron
must cross synaptic gap
pre/post synaptic neuron
end of TB, synaptic vesicles
contain/store neurotransmitters
chemical messengers (nt) converted
AP travelling to the end of the neuron
release neurotransmitter that crosses synaptic gap
NT diffuses across gap
binds to specialised receptors on next cell's dendrites
match w/ particular cell (same kind)
next cell is activated
inhibtory effect
weakens further impulses
exhibitory effect
strengthens further impulses
happens at a post synaptic level
completed in under a second
reuptake process
NT taken back up and recycled by pre-synaptic neuron