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