to collect, process and respond to information in the environment to coordinate the working of different organs and cells in the body
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what is the function of the peripheral nervous system
transmits messages via millions of neurons to and from nervous system
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what is the function of the central nervous system - brain
centre of concious awareness, covered in cerebal cortext which separates humans from animals
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what is the function of the central nervous system - spinal cord
exetention of the brain and responsible for reflex actions, passes messages to and from the brain and connects nerves to PNS
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what is the function of the autonomic nervous system
vital functions such as heart rate, breathing, sexual arousal
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what is the function of the somatic nervous system
somatic nervous system controls muscle movement and sensory receptors
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what are the properties of a bipolar neuron
one dendrite, one axon
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what are the properties of a unipolar neuron
single axon, multiple dendrites
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where does communication between two neurons happen
synapse
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when is action potential triggered
when cells potential reaches a critical threshold and at that threshold point there is a dramatic change in the cell
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how do neurotransmitters diffuse across the synapse
they are 20-40nm across. the fluid filled synapse can engage with receptors on post-synaptic cell membranes. transmitters are stored in vesticles. process of diffusion known as exocytosis.
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what are ionatropic receptors
voltage ion channels open and close according to cells membrane potential. ligated ion channels respond to presence of neurotransmitters.
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what are metabotropic receptors
transmitter binds with MR, receptor can activate a change in chemical events that can change the cell
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what is an agonist drug
mocks effects of transmitter
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what is an antagonist drug
blocks effects of the transmitter
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what is neuroglia
composes of 85% cells in the brain, involved in transports of nutrients and "clean up operations"
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what is the function of microglia
clear up waste
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what is the function of astrocyles
transport nutrients
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what is the function of aligodrenates
produce myelin
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what do walls of capillaries form in the brain
they form a blood brain barrier which means only certain drugs can permeate it and treat certain diseases
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what does a sodium potassium pump do
pumps sodium out, and potassium back into cells. this is needed for resting state to be maintained.
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Other cards in this set
Card 2
Front
what is the function of the peripheral nervous system
Back
transmits messages via millions of neurons to and from nervous system
Card 3
Front
what is the function of the central nervous system - brain
Back
Card 4
Front
what is the function of the central nervous system - spinal cord
Back
Card 5
Front
what is the function of the autonomic nervous system
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