biopsychology: Neurons

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  • Created by: IvyVega
  • Created on: 26-05-18 17:33
types and function of neurons 1
there are 100 billion nerve cells in the human nervous system, 80% are located in the brain. by transmitting signals electrically and hemically, these provide the nervous system with its primary means of communication.
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types and function of neurons 2
motor neurons connect the CNS to effectors, short dendrites, long axons. sensory neurons carry messages from the PNS to the CNS, long dendrites, short axons. relay neurons connect sensory neurons to motor neurons, short dendrites, short axons.
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the structure of a neuron
cell body- includes a nucleus, contains genetic material of cell, dendrites- brank structure protrude from cell body, carry impulses from neighbouring neurons to cell body. axon- carries electrical impulse from cell body
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axons
caries the electrical impulse away from the cell body down the length of the neuron. it is covered in a fatty layer of myelin sheath that protects the axon. gaps in the axon, nodes of ranvier speed up the transmission of the impulse.
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electric transmission. the firing of a neuron.
when a neuron is in aresting state the inside of the cell is negatively charged compared to the outside. when a neuron is activated, the inside of the cell positively charged causing an action potential to occur. this creates an electrical impulse.
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Other cards in this set

Card 2

Front

motor neurons connect the CNS to effectors, short dendrites, long axons. sensory neurons carry messages from the PNS to the CNS, long dendrites, short axons. relay neurons connect sensory neurons to motor neurons, short dendrites, short axons.

Back

types and function of neurons 2

Card 3

Front

cell body- includes a nucleus, contains genetic material of cell, dendrites- brank structure protrude from cell body, carry impulses from neighbouring neurons to cell body. axon- carries electrical impulse from cell body

Back

Preview of the back of card 3

Card 4

Front

caries the electrical impulse away from the cell body down the length of the neuron. it is covered in a fatty layer of myelin sheath that protects the axon. gaps in the axon, nodes of ranvier speed up the transmission of the impulse.

Back

Preview of the back of card 4

Card 5

Front

when a neuron is in aresting state the inside of the cell is negatively charged compared to the outside. when a neuron is activated, the inside of the cell positively charged causing an action potential to occur. this creates an electrical impulse.

Back

Preview of the back of card 5

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