4.5 Co-ordination and homeostasis

  • Created by: 14mut64
  • Created on: 12-05-19 11:42

Homeostasis

  • Homeostasis is the maintenance of constant internal environment.
  • Control of body water content and body temperature are both examples of this.
  • Water is taken into the body and lost through:
    • the skin, as sweat
    • lungs, in breath
    • the kidneys, in urine
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Hormones 1

  • Adrenaline
    • produced in the adrenal glands
    • increases heart rate
    • increases blood flow to muscles
    • decreases blood flow to digestive system
  • Insulin
    • produced in the pancreas
    • reduces glucose levels in blood
    • causing liver to convert glucose to glycogen
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Hormones 2

  • Testosterone
    • produced in the testes
    • promotes gamete fermentation
    • controls secondary sexual characteristics
  • Progesterone
    • produced in the ovaries (corpus luteum)
    • maintains uterus lining
  • Oestrogen
    • produced in the ovaries
    • promotes gamete fermentation
    • controls secondary sexual characteristics
    • trigers the formation of the lining of the uterus
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