2.89 - Hormones

2.89 understand the sources, roles and effects of the following hormones: ADH, adrenaline, insulin, testosterone, progesterone and estrogen.

The hormonal system also coordinates the body. Hormones are chemicals produced by glands. Small amounts of these chemicals are carried around the body in the blood. They tell different parts of the body what to do and then body responds to these hormones. 


Hormones are involved in homeostasis. Hormonal glands are affected by feedback. If the level of hormones in the blood is too high, the glands detects it and makes less hormone. If the level of hormones in the blood is too low, the gland detects it and produces less hormone.