2.5 - Controlling conditions Flashcards
1
Q
How does the body keep its internal conditions within very small limits?
A
By carefully controlling its internal environment
2
Q
What four internal conditions does the body carefully control?
A
- Water content
- Ion content
- Temperature
- Blood sugar level
3
Q
How does the body control its water content?
A
- Water leaves our body all the time as we breathe out and sweat
- We lose any excess water in the urine
4
Q
What is urine produced by?
A
Kidneys
5
Q
How does the body lose ions?
A
In our sweat and urine
6
Q
How does the temperature of the body need to be controlled?
A
It needs to stay constant
7
Q
Why is it important to keep our body temperature constant?
A
Otherwise the enzymes in our body will not work properly, or may not work at all
8
Q
Why do we need sugar in our blood?
A
It is the energy source for cells
9
Q
What is the level of sugar in our blood controlled by?
A
The pancreas
