OCR Biology A2 Module 1 Definitions

What it says on the tin.

Excuse the spelling mistakes ;)

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1. A process that brings about a reversal of any change in conditions. It ensures that an optimum steady state can be maintained, as the internal enviroment is returned to its orginal set of conditions after change. It is essential for Homeostatis

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  • Homeostatis
  • Positive feedback
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2. The maintenance of the internal enviroment in a constant state despite external changes

  • Homeostatis
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  • Positive feedback

3. A process that increases any change detected by the receptors. It tends to be harmful and does not lead to homeostais

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  • Positive feedback
  • Homeostatis

4. A gland that secretes molecules into a duct that carries the molecules to where they are used.

  • Endocrine gland
  • Exocrine gland
  • Hormones

5. Molecules ar released by endocrine glands directly into blood. They act as messengers, carrying a signal from the endocrine gland to a specific target organ or tissue.

  • Exocrine gland
  • Hormones
  • Endocrine gland
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GemJem

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Good crossword and useful for revision, a couple of spelling mistakes off-putting though.

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