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21 Cards in this Set
- Front
- Back
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The nervous system is the centre of all mental activity, including what 3 things? |
Thought, learning and memory |
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Together with the endocrine system, the nervous system is responsible for what? |
regulating and maintaining homeostasis |
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Through it's receptors, the nervous system keeps us in touch with what? |
our environment both internal and external |
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what are the divisions of the nervous systems? |
central and peripheral |
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what organs make up the nervous system? |
brain , spinal cord, nerves and ganglia |
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What parts are in an Axon? |
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nervous system tissue is made up of nerve cells called neurons, and their supporting tissues called ganglia. What are the 3 types of neurons? |
motor , sensory and inter-neurons (communicators) |
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What do motor neurons do? |
cause muscles to contract and glands to secrete and organs to perform their functions, they can also inhibit functions |
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dendrites and axons both carry impulses, which carries to and which carries away? |
dendrites carry impulses to the cell body and axon carries impulses away from it |
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what benefit does an axon that is myelinated over one that isn't? |
they carry impulses faster and once damaged are usually damaged for life |
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what do sensory nerves (afferent) transmit? |
allow the transmission of impulses, or messages, to the central nervous system |
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what do the inter-neurons do? |
found in the central NVS and mediate impulses between the motor and sensory neurons |
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Groups of nerve fibres outside of the CNS are called... |
Nerves |
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Groups of nerve fibres within the CNS are known as... |
Tracts |
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what are stored in the axon terminals? |
chemical neurotransmitters |
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what is the space between neurons called? |
synapse/ synaptic cleft |
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What is the order of information passed along a neuron? |
received in the dendrite
passed through the cell body travels down the axon over the synapse and into the next cell |
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do neurons continue reproducing after birth? |
nope |
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what has new research shown about neuron connections? |
new connections form throughout life |
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What do neuroglia do? |
do not conduct nerve impulses but support , nourish and protect the neurons |
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what differentiates neurons from neuroglia? |
more numerous and capable of mitosis |
