Tuesday, January 31, 2012

2.89 - sources, roles and effects of hormones

ADH  - the pituitary gland produces growth hormone and ADH
- this helps physical development in children
- ADH causes kidney tubules to re-absorb more water into the blood

adrenaline - the adrenal glands produce adrenaline
- this is released in times of danger and prepares for "fight or flight" in a dangerous situation
- the effects are increased heart rate, breathing, sweating, hair standing on end (to make the animal look bigger), and glucose released from liver and muscles

insulin - insulin controls the amount of glucose in the blood
- insulin gives us energy

testosterone - is secreted from the testes
- this causes secondary sexual characteristics in boys

estrogen - is responsible for secondary sexual characteristics in girls

progesterone - works together with estrogen to control the menstrual cycle

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