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Chapter 5
Nervous system and special senses
| Question | Answer |
|---|---|
| Almost all nerve cell bodies are contained in the brain and spinal cord and their fibers extend outward to make up the nerves | True |
| Same as a neuron | Nerve cell |
| Projections from the body of the nerve cell that carry nervous impluses | Nerve fibers |
| Connect with other neurons to receive information | Dendrites |
| Conducts impulses away from the cell body | Axon |
| The junction where nerve signals jumps from one nerve to another | Synapse |
| Carries impulses from sense organs to the brain | Sensory neuron |
| Carries nerve impulses from the brain to the effectors | Motor neuron |
| Neuron located in the brain and spinal cord and carry impulses from one neuron to another | Interneurons |
| Nerve cell including projection of cytoplasm called nerve fibers. | Neuron |
| CNS consist of | Brain and Spinal cord |
| Includes hypothalmus, thalamus adn pineal and pituitary glands and located in the center of the brain | Diencephalon |
| How many segments are in the spinal cord | 31 each attaching to pair of spinal nerves |
| Regulate the action of glands, smooth muscles and the heart | Autonomic Nervous system |
| Consist of nerves the connect the CNS to the voluntary muscle and skin | Somatic nervous system |
| Nerves that connect directly to some part of he brain surface and pass through openings call foramina on the sides and bask of the cranuim | 12 pairs of cranial nerves |
| Nerves that emerge from the spinal cord and are numbered according to the level of the vertebra where they exit the spine | Spinal nerves 31 pairs |
| Number of cervical nerves | 8 |
| Number of thoracic nerves | 12 |
| Number of lumbar nerves | 5 |
| Number of sacral nerves | 5 |
| Number of coccygeal nerves | 1 |
| Largest and longest nerve in the body | Sciatic nerve |
| Sensory nerve located in the nose and functions as sense of smell | Olfactory |
| Prepares the organism for energy-expending, stressful or emergency situations | Sympathetic system |
| What organ dilates blood vessels and increases conversion of glycogen to glucose for more energy | Liver |
| System the conserves energy and reverses the action of the sympathetic division therefore reduces HR, R, BP and increases digestion and elemination | Parasympathetic nervous system |
| Blood clot or ruptured blood vessel in or around the brain and causes destruction of nerve tissue | Stroke or CVA |
| Nerve function sensation-motion and controls upper extremities | Cervical (8) |
Created by:
Protire
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