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chap 12 nervous sys
| Question | Answer |
|---|---|
| Afferent neuron | The neuron that brings information into the central nervous system. |
| Interneuron | The neuron that carries impulses only in the central nervous system. |
| Microglia | A type of neuroglia that is phagocytic. |
| Astrocytes | A type of neuroglia that is star shaped. |
| 31 pairs | The number of pairs of spinal nerves. |
| Satellite cells | Cells that surround the sensory perikaryons in the dorsal root ganglia. |
| Nodes of Ranvier | Unmyelinated gaps on a myelinated neuron. |
| Schwann cells | Cells that secrete myelin in the PNS. |
| Oligodendrocytes | Cells that secrete myelin in the CNS. |
| Enteric nervous system | The division of the PNS that controls the visceral muscle of the digestive tract. |
| Autonomic nervous system | The division of the nervous system that controls homeostasis in the body. |
| Dendrites | Structures that carry impulses to the cell body of the neuron. |
| 1. Define the functions of the nervous system. | sensory, integrative, and motor |
| 2- Major parts of the nervous system. | CNS (brain and spinal cord), and PNS |
| 3-Define Peripheral nervous system | connects to CNS to muscle, glands and all sensory receptors |
| 4-Differentiate between the somatic and autonomic divisions. | somatic: motor division skeleton muscle autonomic: sympathetic and parasympathetic (smooth muscle, GI tract glands, and cardiac muscle) |
| 5- Functional classification of neuron | classified based on direction of nerve impulse propagation |
| Label the 3 Neuron types | motor, sensory, and interneuron |
| 7-Differentiate between white and gray matter | white: white sand dollar / myelinated axons and neuroglia grey: evil grey butterfly/ cell bodies, axons, dendrites, and neuroglia |
| 8-define the neuroglia of CNS | oligodendrocyte, astrocyte, and microglia |
| 9-define the neuroglia of PNS | schwann cells and satellite cells |
| 10-functions of Myelin Sheath: | used for insulation, increased speed of nerve impulse, and aids in regeneration |
| Nervous Tissue | A body tissue that carries electrical messages back and forth between the brain and every other part of the body. |
| 1. The _________neuron bring information into the central nervous system. | efferent/motor neuron |
| 2. The _________ carries impulses only in the central nervous system. | interneuron |
| 3. The _______________ is a type of neuroglia that is phagocytic. | microglia |
| 4. The _____________________ is a type of neuroglia that is star shaped. | astrocyte |
| 5. There are ____________pairs of spinal nerves. | 31 |
| 6. The _______________ cells surround the sensory perikayons in the dorsal root ganglia. | satellite cells |
| 7. The ____________________ are unmyelinated gaps on a myelinated neuron. | nodes of ranvier |
| 8 The _________________ secretes myelin in the PNS. | schwann cells |
| 9. The __________________ secrete myelin in the CNS. | oligodendrocyte |
| 10. Which division of the PNS controls the visceral muscle of digestive tract? | enteric plexus |
| 11. Which division of the Nervous system controls homeostasis in the body? | autonomic nervous system |
| 12.. Impulses are carried to the cell body of the neuron by it's _____________. | dendrites |
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sofasophia
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