Friday, 3 January 2014

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

Lack of water is detected by the hypothalamus in the brain, it causes the pituitary gland to produce Anti-diuretic hormone, or ADH. This makes the kidneys to reabsorb more water- so less is lost from the body.

Produced in the adrenal glands in stressful situations. Heart rate quickens to increase the flow of blood to muscles- this means that they can respire more (as there is more oxygen available) to provide energy if you need to 'fight or flee'.

Produced in the pancreas when there is too much glucose in the blood. It stimulates cells to convert the glucose into glycogen which is a from that can be stored. This means that you always have the right amount of glucose in your blood.

Produced in ovaries in girls and testicles in boys. Plays a key role in puberty, developing sex organs and inspiring hair growth.

Produced in the ovaries it maintains the lining ready for pregnancy, and continues to do so if the egg is fertilised.

Produced in the ovaries, it is controls other hormones to regulate the menstrual cycle. It stops the production of FSH and starts the production of LH.


  1. 'This makes the kidneys reabsorb more water'
    'Acts on the wall of the collecting duct in the nephron to make it more permeable to water'

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  5. Testosterone is only produced in boys girls have oestrogen which brings about their secondary sexual characteristics

    1. Testosterone isn't only produced in males, it's just they produce more of it than females do

    2. no testosterone is only produced in males. oestrogen is produced less in males than females

    3. In females: Small amount of testosterone produced in ovaries.
      In Males: Small amount of oestrogen made in testis, brain and also gained from eating alot of poultery.

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