Hormones Flashcards
what does insulin do
controls blood glucose concentrations
what does ADH do and what does it stand for
controls water content of body- Antidiuretic hormone
How do Antidiuretic hormones come from and work
produced in the brain when a lack of water is detected, ADH causes reabsorption of water from urine the from kidneys to go back into the blood stream, causes a lower volume of more concentrated urine and returns blood water levels to normal
where is insulin created
Pancreas
how does insulin work
The pancreas detects higher levels of blood glucose and creates insulin. when a meal high in carbohydrates is eaten
Insulin acts in the liver and reduces blood glucose by:
- increasing glucose absorption from the blood by the muscles and liver
- converting excess glucose to glycogen which is stored mainly in the liver but also muscle;
- increasing respiration in the liver.
What is negative feedback
When a substance is being decreased due to certain hormone levels increasing
e.g. an increase in insulin decreases blood glucose concentration.
what causes diabetes
when someone cannot produce enough insulin to control their blood sugar concentration.
how do we lose water
- sweating
- urinating
- evaporation in lungs
what is osmoregulation
occurs when water levels in the body are not balanced and fixes this (water out= water in)
If water is too low:
- Kidney produces a small volume of highly concentrated urine. Makes us thirsty - so we drink/ take in more water
if water is too high:
- Kidney produces a large volume of dilute urine, so we excrete more water
Glucagon
increases blood sugar levels, turns glycogen into glucose
Function of FSH ()
Causes an egg to mature in an ovary. Stimulates the ovaries to release oestrogen
stimulated by pituatry gland
function of oestrogen
- Stops FSH being produced (so that only one egg matures in a cycle).
- Stimulates the pituitary gland to release LH.
stimulated in ovaries
function of LH
Triggers ovulation (the release of a mature egg)
stimulated in pituitary gland
