B11 hormonal coordination Flashcards
What is TSH
Thyroxine stimulating hormone
What does thyroxine do
Stimulates basal metabolic rate and is important for growth and development
How are thyroxine levels kept stable
Through a negative feedback loop
What does insulin do
It enters the blood stream and allows glucose to be absorbed by body cells
What happens to excess glucose
It is converted to glycogen for storage
What is type 1 diabetes
When pancreas fails to produce sufficient insulin and it treated by insulin injections
What is type 2 diabetes
Cells no longer respond to insulin causing obesity and is treated by exercise or carb controlled diet
What is adrenaline
Produced in times of fear or stress and it increases heart rate oxygen and glucose delivery to brain and muscles preparing the body for flight or fight
What is Oestrogen
A female reproductive hormone produced in the ovaries
What is ovulation
At puberty eggs begin to mature and released every 28 days
What’s testosterone
The male reproductive hormone produced in the testes and stimulates sperm production
What does FSH do
It tell the egg to start maturing and stimulates the ovary to produce oestrogen
What does Oestrogen do
Starts the build up of the uterus lining, stops FSH and causes the release of LH
What does LH do
Triggers ovulation - egg release
What does progesterone do
Maintains the lining for 10 days and prevents LH and FSH
How can fertility be prevented
Through contraception eg. The pill, condoms, IUD…
Disadvantages of IVF
A very emotional and physically stressful process which doesn’t have a high success rate and can lead to multiple births risking the babies and mother
What’s the process of IVF
- Mother is given FSH and LH to mature several eggs in the ovaries
- Eggs extracted and fertilised from sperm donors
- Fertilised eggs develop into embryos
- 1or2 embryos are inserted into the mothers womb to them give birth
