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21 Cards in this Set
- Front
- Back
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Brain and spinal cord |
CNS |
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Nerves, sensory receptors, ganglia |
Peripheral nervous system |
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All signals coming in to the cns |
Sensory division |
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All signals going out of the CNS |
Motor division |
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Outgoing signals for control of skeletal muscles |
Somatic |
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Outgoing signals to all else, controls involuntary functions |
Autonomic |
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Fight or flight division. Prepares for physical activity |
Sympathetic |
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Rest and relaxation division |
Parasympathetic division |
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Local control of digestive system |
Enteric |
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Incoming signals. Any nueron which sends an action potential towards the spinal cord or brain. Afferent |
Sensory neurons |
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Outgoing signals, any neuron which sends an action potential away from the spinal cord or brain. Efferent |
Motor neuron |
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In between sensory and motor |
Interneurons |
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Many dendrites and one axon |
Multipolar neuron |
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One dendrite and one axon. Called this because it has one dendrites (one pole) and one axon (another pole) |
Bipolar neuron |
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No dendrites and one axon |
Unipolar neuron |
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Neurolgial cell of CNS. Epithelial cells making the blood brain barrier. Allow nutrient and waste exchange. Surround the capillaries in the brain. Can determine what can leave the blood and enter the brain. Not here to protect the brain from harmful chemicals and foreign invaders. Special to protect neurons because if neurons are lost they won't be replaced |
Astrocytes |
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Neurolglial cell of CNS. Epithelial cells lining the ventricle of the brain. Produce cerebrospinal fluid. Ventricles are the four fluid filled cavities deep inside brain. This fluid provides nutrients to the neurons and makes a fluid cushion around the brain and spinal cord. The cilia on the surface are there to move the fluid through ventricals |
Ependymal cells |
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Neurolgial cells of CNS. White blood cells if nervous system. These cells will remove anything which doesn't belong |
Microglial |
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Neurolglial cell of CNS.. Form myelin she's the around axons. Act as insulation for action potentials. Insulation around axon is like rubber and copper in electrical appliance. Insulation keeps the electricity in the wire and our axons need the same insulation. Speeds up action potentials |
Oligodendrocytes |
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Neurolglial cell of PNS. Form myelin sheath around axons. Cells provide the myelin insulation in the pns. Myelin always keeps action potentials in twelve axon and speeds up an axon potential |
Schwann cells |
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Neuroglial of PNS. Surround the bodies of neurons to help provide nutrients. Neuron are the most active cells in the body so they require a lot of nutrients. |
Satellite cells |
