2.5 Controlling Conditions Flashcards
1
Q
What does the body control?
A
Its internal environment?
2
Q
What are the four internal conditions that must be controlled?
A
Water content, ion content, temperature and blood sugar level
3
Q
How do we lose water from the body?
A
By breathing out and sweating and in the urine
4
Q
What is urine produced by?
A
The kidneys
5
Q
How do we lose our ions?
A
By sweating and in the urine
6
Q
Why must we keep body temperature constant?
A
So the enzymes in our body can work properly
7
Q
Why is there sugar in the blood?
A
Because it is the energy source for cells
8
Q
What is blood sugar level controlled by?
A
The pancreas
9
Q
What are many processes in the body co-ordinated by?
A
Chemical substances called hormones
10
Q
How do hormones travel around the body?
A
In the bloodstream
11
Q
What are hormones secreted by?
A
Glands
