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| arriving to the brain, sensory (on the back of body primarily)mostly unipolar |
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| exiting the brain, motor neurons ( primarily on the front of the body to move it)mostly multipolar |
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| brain and spinal cord (main control center) |
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| peripheral nervous system |
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| all the connecting nerves that brainch off the brain. set up to work in both directions. sensory and mot or division(somatic and autonomic) (autonomic has sympathetic and parasympathetic) |
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| glial cells (6types)(4 in CNS 2 in PNS) |
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| provide support, nutrition,insulation etc. and help with signal transmission in the nervous system (outnumber the neurons) |
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| each only has one signal that they transmit and one uniform strength and speed. The only thing that changes is the frequency at which the signal can fire.brain then identifies the signal by location,sensation,magnitude, and importance. The buzz impulse is the action potential |
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| transmit electrical impulses away from the cell body to the other cells (talker) |
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| branch like extensions form the neuronal cell body that pass information to the cell body (listener) |
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| help form the myelin sheath which wraps around an axon to help transmit electrical signals faster |
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| sensory receptors on the skin detect spider legs on knee |
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| bain processes information and decides what you should do about it by sorting through the options |
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| scream run around like a crazy person ( the response that occurs when your nevous system activates certain parts of your body) |
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| respond to stimuli and transmit signals |
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| Types and Functions of glial cells in the CNS |
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Definition
Astrocytes- support, regulate ions(exchange of materials between neurons and capillaries)
Microglial cells- defend, immune defense against invading microorganisms
Ependymal cells - line cavities, create,secrete,and circulate cerebrospinal fluid
Oligodendrocytes-wrap and insulate, form myelin sheath |
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| Types and functions of glial cells in the PNS |
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Definition
Satellite cells- surround and support neuron cell bodies
Schwann cells-insulate, help form myelin sheath |
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| 3 things all neurons have in common |
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Definition
| long lived, irreplaceable, have huge appetites |
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Definition
(processes meaning a projecting part of an organic structure)
multipolar- three or more processes sticking out from the soma (99% of all neurons)
bipolar-two processes- an axon and a single dendrite extending from opposite sides of the cell body
unipolar-just 1 process, found mostly in your sensory receptors |
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association neurons
impulse moves between sensory and motor neurons
mostly multipolar |
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| the measure of potential energy generated by separated charges |
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