B9 - Respiration Flashcards
1
Q
Cellular respiration?
A
Exothermic reaction that occurs continuously in living cells
2
Q
Word equation for aerobic respiration?
A
Glucose + oxygen –> carbon dioxide + water
3
Q
What do you muscles store glucose as?
A
Glycogen
4
Q
During exercise..?
A
- Glycogen stores in the muscles are converted to glucose for cellular respiration.
- Increase in heart rate, breathing rate and breathing volume
- Flow of oxygenated blood to muscles increases
5
Q
Define anaerobic respiration?
A
Respiration without oxygen.
6
Q
What is glucose broken down into in anaerobic respiration during exercice in humans?
A
Lactic acid
7
Q
After working for a long time, muscles….
A
Become fatigued and don’t contract efficiently. If oxygen is limited, anaerobic respiration occurs
8
Q
Define oxygen debt?
A
The extra oxygen that must be taken into the body after exercise has stopped to complete the breakdown of lactic acid.
9
Q
What does metabolism include?
A
- Conversion of glucose into starch
- Glycogen used to make cellulose
- Formation of lipid molecules
- Use of glucose and nitrate ions to make amino acids (used in protein synthesis and the break down of excess proteins into urea)
10
Q
Where is lactic acid converted into glucose?
A
The liver
