Monday, 6 February 2012

2.89 Hormonal Responses

Understand the sources, roles and effects of the following hormones: Anti-Diuretic Hormone, Adrenaline, Insulin, Testosterone, Progesterone and Oestrogen.



Hormonal system also coordinates the body, hormones are chemicals which are produced by glands and travel to certain parts of the body through the bloodstream.

Adrenaline glands secrete adrenaline, which increases heart rate and makes the subject more alert, this is secreted when the person is nervous, frightened or angry and helps your body cope with emergencies.

ADH controls the level of the water in your body, it controls the amount of water re-absorption in the collecting duct and is produced in the pituitary gland in the brain.

Pancreas secrets insulin and the main purpose of insulin is to lower blood sugar levels. On the other hand, pancreas also secretes, glucagon which increases blood sugar level.

Testosterone is produced in the testes in males which develops male features during puberty which matures sperm cells in males.

Ovaries produce progesterone and oestrogen in females, these control the menstrual cycle and develops female features during puberty.

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