synapses
- Created by: cieran32
- Created on: 20-09-18 09:26
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- synapses
- neurons do not need to make direct contact; there is a small gap called a synapse
- signals need to cross this gap to continue on its journey to, or from the CNS
- this is done using chemicals which diffuse across the gap between the two neurons.
- chemicals= neurons transmitters
- how is resting potential created
- sodium ions (NAT) are actively transported out of the axon whereas potassium ions are actively transported into the axon via the sodium-potassium pump
- After the sensory receptor has detected a change in the environment, an impulse is sent along the neuron by temporarily changing the voltage across the axon membrane; membrane switches between 2 states resting and action potential
- resting potential
- when a neuron is not transmitting an impulse, the potential difference across its membrane is (difference in charge between the inside and outside of the axon) known as resting potential
- outside of the membrane is more positively charged than the inside of the axon
- this occurs when the movement of sodium and potassium ions move acriss the memebrane
- neurons do not need to make direct contact; there is a small gap called a synapse
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