Co-ordination and Control: Homeostasis Flashcards
1
Q
What is homeostasis?
A
when the body maintains a constant internal environment
2
Q
What does the body need to control?
A
- water content
- ion content
- temperature
- blood sugar levels
3
Q
Inputs of water
A
- food
- drink
4
Q
How does body balance water?
A
- sweat
- urine
- kidneys (excess water)
5
Q
How is urine affected on a hot day?
A
- more sweat
- less urine
- more concentrated colour
- more water loss through breath
6
Q
How is urine affected on a cold day?
A
- less sweat
- more urine
- paler colour
7
Q
How is ion content balanced?
A
- sweat
- urine (excess)
8
Q
what temperature does the body work best at?
A
approx. 37 degrees
9
Q
what happens to the enzymes if the body temperature is too hot?
A
- they will denature
10
Q
what happens to the enzymes if the body temperature is too cold?
A
- enzymes will slow down
- harder to survive
11
Q
What organ controls sugar levels?
A
pancreas
12
Q
How is blood sugar lowered?
A
insulin converts glucose to glycogen
13
Q
how is blood sugar raised?
A
glucagon converts glycogen to glucose
