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| what 2 kinds of cells does the nervous system consist of |
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| receive info and transmit it to other cells |
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| the brain is composed of ____________ cells, (like the rest of the body) |
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| what are the major parts of a neuron (9) |
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Definition
plasma membrane- lipid bilayer: protects
nucleus- contains genetic info
mitochondria- metabolism
ribosomes- make proteins
endoplasmic reticulum- transports proteins
-- dendrites
-- soma
-- axon
-- presynaptic terminals |
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motor neuron
sensory neuron |
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| distinctive feature of neurons |
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cell body in spinal cord
recieves excitation thru dendrites and conducts impulses along axon to a muscle |
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| specialized at one end to be highly sensitive to stimulation (touch, etc) |
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branching fibers
surface is lined with synaptic receptors, at which it receives information |
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Term
| greater surface area of a dendrite = |
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| shape of a dendrite has a lot to do with how the dendrite |
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Definition
| combines different kinds of input |
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Definition
contains cellular structures
covered with synapses on its surface |
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Definition
| thin fiber that sends information from one neuron to another |
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Definition
| insulating material that covers axons |
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the swollen tip of an axon
point from which the axon releases chemicals |
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| the shape of a neuron determines its ____________ with other neurons, and thereby determines its ___________ to the nervous system |
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Definition
exchanges chemicals with adjacent neurons
doesn't transmit information over long distances |
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