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18. NEURAL SIGNALLING - Coggle Diagram
18. NEURAL SIGNALLING
RESTING POTENTIAL
THE UNEQUAL DISTRIBUTION OF NA AN K IONS ACROSS THE MEMBRANE CREATES A CHARGE DIFFERENCE CALLED A MEMBRANE POTENTIAL
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NEUROTRANSMITTER RELEASE
WHEN ACTION POTENTIAL REACHES THE AXON TERMINAL, VOLTAGE-GATED CALCIUM CHANNELS OPEN
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ACTION POTENTIAL
AS NA AND K CHANNELS OPEN, THEY CAUSE AN ELECTRICAL CHARGE
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AS SODIUM ENTERS, IT CAUSES DEPOLARIZATION
AS POTASSIUM LEAVES, IT CAUSES REPOLARIZATION
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EMERGENT PROPERTIES
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FOR EXAMPLE, CONSCIOUSNESS WHICH IS THE STATE OF BEING AWAKE AND AWARE
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SALTATORY CONDUCTION
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MYELIN SHEATH IS STRUCTURED IN SEGMENTS WITH ION CHANNELS CLUSTERED AT THE GAPS BETWEEN EACH SEGMENT
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PAIN PERCEPTION
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THE SENSORY NEURON COMMUNICATES WITH AN INTERNEURON AND TO THE SPINAL CORD ENDING WITH THE CEREBRAL CORTEX
PAIN STIMULI CAN BE MECHANICAL, THERMAL OR CHEMICAL SUCH AS CAPSAICIN IN CHILLI PEPPERS
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