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Cell Communication
Communication between Cells
| Question | Answer |
|---|---|
| Why is communication between cells so important? | Without it, the body environment would be unstable and unable to function. |
| What is homeostasis? | The maintenance of a relatively stable internal environment. |
| What is Negative feedback? | A change in a variable (eg drop in body temperature) and an action to produce a change in the opposite direction. Negative - opposite |
| What is Positive feedback? | Procedure that increases further change in variable that brought on the initial change. |
| What are signalling molecules? | Used by cells to communicate. |
| What are the 4 different types of signalling molecules? | Autocrine, Paracrine, Endocrine and Exocrine. |
| How can signalling molecules be classified? | By the distance between the cell that releases the signalling molecule and the target cell. |
| What is Autocrine? | When target cell is same cell releasing the signal molecule. |
| What is Paracrine? | When target cell is nearby to the cell releasing the signal molecule. |
| What is Endocrine? | When target cell is far away to the cell releasing the signal molecule. |
| What is the Exocrine? | When the target cell is outside the organism. |
| In terms of controlling blood glucose levels, what is the role of insulin? | Controls uptake by the cells of glucose from the blood. |
| In terms of controlling blood glucose levels, what is the role of glucagon? | Acts on the liver to release more glucose into the blood. |
Created by:
zarap103
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