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Understand the sources, roles and effects of the following hormones: ADH, adrenaline, insulin, testosterone, progesterone and oestrogen.


Hormones- Chemicals released by a cell or a gland which sends out messages that affect other parts of the organism. 

• ADH- controls the amount of water in the blood. It is produced in the Pituitary gland. 
• Adrenaline- Increases heart rate and breathing rate during exercise. It is produced in the Adrenal gland.
• Insulin- Decreases the level of glucose in the blood. It is produced in the pancreas. 
• Testosterone- This hormone triggers puberty in boys. It is produced in the testis. 
• Progesterone- Controls the menstrual cycle in females. It is produced in the ovaries.
• Oestrogen- Triggers puberty in girls and stimulates growth of uterus lining. It is also produced in the ovaries.