Communication<br />Comparison of the nervous and endocrine systems<br />
How does a Nerve Impulse work?<br /><ul><li>Sensation
Stimuli are received by receptors
Integration
Interpretation of the stimulus to choose an appropriate response
Reaction
Usually activation of a muscle or gland</li></li></ul><li>How does the message travel in the nervous system?<br />dendrite...
Because neurons never touch, chemical signalers called neurotransmitters must travel through thespace called the synapse,...
Response to an external stimulus<br />
Response to an internal stimulus<br />Draw a flow diagram to illustrate this feedback loop<br />
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Cell Communication

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Cell Communication

  1. 1. Communication<br />Comparison of the nervous and endocrine systems<br />
  2. 2. How does a Nerve Impulse work?<br /><ul><li>Sensation
  3. 3. Stimuli are received by receptors
  4. 4. Integration
  5. 5. Interpretation of the stimulus to choose an appropriate response
  6. 6. Reaction
  7. 7. Usually activation of a muscle or gland</li></li></ul><li>How does the message travel in the nervous system?<br />dendrite<br />synapse<br />
  8. 8. Because neurons never touch, chemical signalers called neurotransmitters must travel through thespace called the synapse,between two neurons.<br />Neurotransmitters<br />(pink<br />spheres)<br />The message is transferred whenRECEPTORSreceive neurotransmitters.<br />Synapse (gap)<br />
  9. 9. Response to an external stimulus<br />
  10. 10. Response to an internal stimulus<br />Draw a flow diagram to illustrate this feedback loop<br />
  11. 11. How does the endocrine system work?<br /><ul><li>Endocrine gland
  12. 12. Produces hormone
  13. 13. Hormone
  14. 14. A chemical messenger that is secreted into the bloodstream
  15. 15. Target cells
  16. 16. Cells that have receptors for the hormone</li></li></ul><li>How does the message travel in the endocrine system?<br />
  17. 17. Draw a flow diagram to illustrate this feeback loop<br />
  18. 18. Comparison of endocrine and nervous systems<br />Chemical only<br />Chemical & electrical<br />Hormone<br />Neurotransmitter<br />Through the blood<br />Along the nerves<br />Slow<br />Fast<br />Action lasts a long time<br />Action lasts a short time<br />Lots because it is diluted as it travels through the body<br />A little because it is delivered directly to the place it is needed<br />Any cell with the receptor<br />Nerves, muscles, glands<br />
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