Unit 3 Animals: The Nervous System
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Created by:
MrsChristinaPaulk on November 2, 2011
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Description:
This set of flashcards will help you prepare for Science 6 Unit 3 Quiz 1 and the final unit test.
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25 terms
Terms | Definitions |
|---|---|
 axon | sending end of a neuron |
| dendrite | receiving end of a neuron |
| ganglia | clusters of individual neurons |
| plexus | one of four major bundles of ganglia gathered near the spinal column |
| synapse | area between neurons that chemically passes on messages |
| central nervous system | made of the brain, nerves, and spinal cord |
| neurons | Nerve cells with unique shapes which allow them to carry electrical signals. |
| spinal cord | messages are sent from neuron to neuron until they reach gets to the _____ or brain |
| Electrical impulses | The impulse travels from the axon through the synapse to the dendrites of the next neuron. |
| neuron | three main parts: the axon, dendrite, and cell body |
| spinal cord | The brain is connected to 12 pairs of nerve bundles that run through the center of the spine. |
| spinal column | protects the spinal cord (also known as a backbone) |
| spinal cord | intercepts and interprets danger signals from various parts of the body |
| reflex reaction | spinal cord intercepts messages and immediately sends a message to the muscles |
| involuntary actions | These functions are a part of the autonomic nervous system: breathing, sneezing, digestion, and heartbeat (things done without thinking). |
| ganglia | a clusters of neurons that come together near the spinal cord from various parts of the body |
| ganglia | nerve centers capable of controlling the involuntary actions of our muscles and glands |
| autonomic nervous system | breathing, sneezing, digestion, and heartbeat |
| ganglia and plexus | control all the involuntary actions like digestion, breathing, heartbeat, and sweating |
| sense organs | have a unique system of nerves that control them |
| nose | sense of smell sends messages to the cerebrum for interpretation |
| tongue | sensitive to sweet, sour, bitter, and salty tastes (sense of taste) |
| skin | These nerves are sensitive to pressure, pain, hot, and cold (sense of touch). |
| eyes | receivers of visual stimuli (sense of sight) |
| ears | receivers or auditory stimuli (sense of hearing) |
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