Hormones

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  • Hormones
    • Adrenaline
      • Fight or flight response
      • From adrenal glands
      • Increases heart rate
      • Boosts delivery of oxygen and glucose to brain & muscles (respire faster)
    • Thyroxine
      • Produced by thyroid gland
      • Increases metabolic rate
      • Controls growth / development of young animals
      • Release stimulated by TSH
    • Glucagon
      • Blood glucose concentration too low = glucagon
      • Stimulates conversion of glycogen to glucose
      • Released by pancreas
        • Insulin
          • Blood glucose concentration too high = insulin
          • Glucose moves from blood to liver/muscle cells
          • Excess glucose -> glycogen
    • Insulin
      • Blood glucose concentration too high = insulin
      • Glucose moves from blood to liver/muscle cells
      • Excess glucose -> glycogen
    • ADH (Anti-Diuretic Hormone)
      • More water = less ADH from pituitary gland
      • Higher blood concentration = more ADH
      • Less ADH = less water reabsorbed by kidney = more urine
      • Urea from liver, breakdown of proteins (contains nitrogen)
      • Excess amino acids converted to ammonia, ammonia converted to urea
    • Progesterone
      • Progesterone inhibits FSH and LH
        • LH (Luteinising Hormone)
          • Stimulates release of egg from ovary (ovulation)
        • FSH (Follicle Stimulating Hormone)
          • FSH stimulates oestrogen / oestrogen inhibits FSH
            • Oestrogen
              • Oestrogen stimulates LH
                • LH (Luteinising Hormone)
                  • Stimulates release of egg from ovary (ovulation)
              • Makes lining of uterus regenerate after menstruation
          • Causes eggs to mature in ovaries
      • Maintains lining of uterus in 2nd half of cycle
    • Oestrogen
      • Oestrogen stimulates LH
        • Makes lining of uterus regenerate after menstruation
      • FSH (Follicle Stimulating Hormone)
        • FSH stimulates oestrogen / oestrogen inhibits FSH
          • Causes eggs to mature in ovaries

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