B1.2.2 - Control in the human body Flashcards
How are hormones transported?
They’re secreted by glands and are usually transported to their target organs through the bloodstream
Why do blood sugar levels have to be controlled inside the body?
To supply cells with a constant supply of energy
What are hormones?
Chemicals
What do hormones do?
They regulate the functions of many organs and cells
What’s an example of something that a hormone regulates?
The monthly release of an egg from a woman’s ovaries & the changes in thickness of her womb lining are controlled by hormones secreted by the pituitary gland + ovaries.
What is follicle stimulating hormone secreted by?
The pituitary gland
What does follicle stimulating hormone (FSH) do?
- Causes eggs to mature in ovaries
- Stimulates ovaries to produce hormones eg. oestrogen
What does lutenising hormone (LH) do?
Stimulates release of eggs from the ovaries
What is oestrogen secreted by?
Ovaries
What does oestrogen prohibit?
Further production of FSH
Can hormones control fertility?
Yes
Why is temperature controlled inside your body?
Because it maintains the temperature so enzymes work best
What happens to the water content in your body?
- Water leaves the body via the lungs when we breathe out and via the skin when we sweat to cool us down
- Excess water is lost via the kidneys in the urine
How is water content in the body controlled?
Water leaves the body via the lungs when we breathe out and via the skin when we swear to cool us down
Excess water is lost via the kidneys in urine
How is ion content in the body controlled?
Ions are lost via the sky when we sweat and via the kidney in urine
