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SS3: BIOLOGY - 1ST TERM

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  1. Regulation of Internal Environment I | Week 1
    6 Topics
    |
    1 Quiz
  2. Regulation of Internal Environment II | Week 2
    4 Topics
    |
    1 Quiz
  3. Regulation of Internal Environment III | Week 2 (Contd)
    3 Topics
    |
    1 Quiz
  4. Nervous Coordination I | Week 3
    2 Topics
    |
    1 Quiz
  5. Nervous Coordination II | Week 4
    4 Topics
    |
    1 Quiz
  6. Sense Organs I | Week 5
    6 Topics
    |
    1 Quiz
  7. Sense Organs II | Week 6
    3 Topics
    |
    1 Quiz
  8. Ecology of Population | Week 7
    3 Topics
    |
    1 Quiz
  9. Balance in Nature | Week 8
    3 Topics
    |
    1 Quiz
  10. Reproductive Systems and Reproduction in Man I | Week 9
    4 Topics
    |
    1 Quiz
  11. Reproductive Systems and Reproduction in Man II | Week 10
    3 Topics
    |
    1 Quiz
  12. Development of New Seeds | Week 11
    4 Topics
    |
    1 Quiz
  13. Fruits | Week 12
    3 Topics
    |
    1 Quiz



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Topic Content:

  • Osmoregulation
  • Acid-Base Balance

1. Osmoregulation:

This is the control of water and mineral salts in the body. When there is excess water in the blood, the kidney, under the influence of the Anti-Diuretic Hormone, excretes much water so that the amount of water is brought back to a normal level. Less ADH will be released from the pituitary gland. The kidney tubules become less permeable to water. This means less water is reabsorbed into the bloodstream and a larger volume of dilute urine will be produced.

 

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