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| Neurons respond to environmental changes by means of three special features... |
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axons dentrites glial cells |
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| carry signals away to the neuron to points where communication occurs within the neurons |
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| detect and carry info from other nerve cells to cell body |
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tiny gaps within neurons across which they communicate |
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Term
why is it important that the neuronal membrane is selectively permeable? What happens as a result? |
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Definition
| it keeps positively charged ions from freely entering axon through gates or channels. As a result the membrane becomes electrically polarized, such that the inside of the cell is more negative charged than the outside |
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| As action potential occurs what 5 things happen? Where does this occur? |
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Definition
· 1) some part of the axon membrane becomes depolarized causing a gate to open. 2) Positively charged ions rush into the axon, causing the neighboring gates to open as well, 3) and more positive ions rush in. This chain of events occurs along the entire length of the axon |
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