Homeostasis and Response
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1
What is homeostasis?
the maintenance of a constant internal environment
2
What does homeostasis control in the body?
Blood glucose, body temperature and water levels
3
What do receptors do?
detect stimuli - changes in the environment
4
What do coordination centres do?
process the info received from the receptors (e.g. brain, spinal cord and pancreas)
5
What do effectors do?
bring about responses to restore optimum levels in the body (e.g. muscles or glands)
6
What gland is known as thr master gland and what does it do?
Pituitary gland- releases a varierty of hormones
7
What does the pancreas release and what does it do?
Insulin- helps control blood sugar levels
8
What does the adrenal gland release and what does it do?
adrenaline- triggers the body’s fight or flight response
9
What does the thyroid gland release and what does it do?
thyroxine- controls the body’s metabolic rate
10
What do the ovaries release and what does it do?
oestrogen- affects the menstrual cycle
11
What system sends chemical messengers?
the endocrine system
12
What organ responds to insulin?
the liver
13
What is produced in the testes and what is used for?
testosterone and sperm- involved in development of males
14
How do hormones travel around the body?
in the bloodstream
15
What happens when glucose levels rise?
insulin is produced
16
What causes Type 1 diabetes?
the pancreas reduces insulin production until it stops
17
What organ uses glucose during exercise?
the muscles
18
What does glucagon do?
triggers liver to convert glycogen back into glucose
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