The Nervous System 8
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| What is one the function of the Nervous System? | To detect and feel sensations.
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| What is another function of the Nervous System? | To initiate appropriate responses to changes.
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| The last function of the Nervous System is? | To organize information for immediate use and store it for future use.
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| The CNS or (Central Nervous System is made up of? | The brain and spinal cord.
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| The PNS or (Peripheral Nervous System is made up of? | 12 cranial, 31 spinal nerves and all branches for them.
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| The Neuron of the nerve tissue is made up of? | Nerve Cells
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| What are the processes of the neuron? | Nerve fibers
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| What moves toward the cell body? | Dendrites
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| What moves away from the cell body? | Axon
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| The neuron fiber covering is called? | Myelin Sheath
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| The Myelin Sheath is made up of what type of cells? | Schwann Cells
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| The spaces between the Schwann cells is called? | Nodes of Ranvier
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| Neuroglial cells do what? | Move and phagocytize pathogens and damaged tissue
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| Oligodendrocytes produce _________ in the CNS? | Myelin
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| What lines the ventricles to help with CSF circulation? | Cilia
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| What prevents harmful substances from entering the brain? | BBB or Blood Brain Barrier
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| The space between the axon of one neuron and dendrite or cell body of another? | Synapse
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| The chemicals that excite or inhibit a neuron in a synapse? | Neurotransmitters
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| Excitatory causes postsynaptic neuron to do what? | Depolarize
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| Inhibitory causes the postsynaptic neuron to do what? | Hyper polarize
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| The enzyme that inactivates neurotransmitter to stop the impulse until needed again is called? | In activator
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| Re absorption of neurotransmitter back into neuron that released it is called what? | Re uptake
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| What are the three types of Neurons? | Afferent, Efferent, and inter neurons
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| What produces the impulse in the neuron? | Receptors
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| The receptors in the skin are called? | Symatic neurons
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| Receptors of the internal organs are called? | Visceral neurons
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| Sensory neurons are all known as? | Afferent
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| Afferent neurons produce what? | Impulses to the CNS
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| Motor neurons are also known as? | Efferent
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| Efferent neurons move from? | The CNS to the effector
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| What are the 2 types of efferent neurons are called? | Symatic and Visceral
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| Symatic neurons effect what? | Skeletal muscle
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| Visceral neurons effect what? | Smooth muscle, cardiac muscle and glands.
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| What type of neurons connect the CNS neurons together? | Interneurons
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| Groups of nerve fibers are called? | The nerve
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| Sensory nerves are only? | Afferent
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| Motor nerves are only? | Efferent
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| Mixed nerves are both? | Afferent and Efferent
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| The nerve tract is made up of what? | Bundles of functionally related fibers in the CNS
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| The electromechanical signal carried by the nerve is called the? | Nerve impulse
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| At rest a neuron is? | Polarized and is more positive on the outside
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| The gradient is set up using sodium potassium what? | Pumps
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| Depolarization followed by repolarization is called what? | Action Potential
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| The reversal of charges is called? | Depolarization
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