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Urine formation osmo regulation
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Urine formation osmo regulation

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Transcript

  • 1. Kidneys in Urine Formation
    Pg 226-229
    Urine Formation
  • 2. Processes in Urine Formation
    *Ultrafiltration
    *Selective reabsorption
    Secretion
    Excretion
    2
  • 3. Ultrafiltration
    • Process whereby small molecules such as water, glucose, amino acids, sodium chloride and urea in blood are forced through the basement membrane of the Bowman's capsule and into the nephron at high pressure.
    3
  • 4. Selective reabsorption
    4
    http://www.hcc.uce.ac.uk/physiology/selective%20reabsorption2.gif
  • 5. 5
    http://www.biologymad.com/resources/kidney.swf
  • 6. Kidney as Osmoregulators
    Pg 230 - 231
    Osmoregulation
  • 7. Definition of osmoregulation
    Is the control of water and solute levels (e.g. salt, sugar) in the blood to maintain a constant water potential in the body
  • 8. What controls amount of water in the blood?
    Controlled by vasopressin or antidiuretic hormone (ADH).
    Produced by a region called hypothalamus of the brain.
    Released by the pituitary gland of the brain.
    Pituitary
    Hypothalamus region
    mmmmmmmmmm
    mmmm
  • 9. How to control amount of water in the blood?
  • 10. 10
  • 11. How to control amount of glucose in the blood?
  • 12. How to control amount of salt in the blood?