section 2. (5) outline the need for oxygen in living cells and explain why removal of carbon dioxide from cells is essential Flashcards
1
Q
Why do all living cells require oxygen?
A
- to carry out respiration
- respiration provides the energy needed to survive
2
Q
why must carbon dioxide be removed from all cells?
A
- increases acidity
3
Q
How does carbon dioxide increase cell acidity?
A
- when dissolved in water produces carbonic acid
- carbonic acid lowers the pH
- at normal carbon dioxide levels, the equlibrium between CO2 and H2CO3 is important for blood to maintain its normal pH
4
Q
what is the oxidation of glucose?
A
The conversion of glucose into a form which can be used by living cells. This process involves oxygen combining with the glucose, through a series of enzyme-controlled reactions, through which chemical energy is released as ATP.
5
Q
What is the effect of a build-up of carbonic acid?
A
If carbonic acid is built up it is toxic and it can change the pH of cells and bloodstream – thus affecting the homeostatic balance within an organism.
