4.4.2.2 Response to Exercise Flashcards
1
Q
What does increased respiration mean for muscles?
A
- can contract more frequently with the extra energy
2
Q
What increases to get more oxygen into the blood?
A
- breathing rate
- breath volume
- heart rate
3
Q
What happens when you do vigorous exercise?
A
- body can’t supply enough oxygen to muscles, so they respire anaerobically
4
Q
What are the negatives when the muscles respire anaerobically for too long?
A
- painful as lactic acid builds up
- muscle fatigue as muscles stop contracting efficiently
5
Q
What is oxygen debt?
A
- the amount of extra oxygen your body needs to react with the build up of lactic acid and remove it from cells
- couldn’t keep up with demand
6
Q
How does oxygen debt occur?
A
- when you stop exercising and body has resorted to anaerobic respiration
7
Q
What stays high whilst there are high levels of lactic acid and carbon dioxide?
A
- pulse
- breathing rate
8
Q
What is the body’s other way of coping with high levels of lactic acid?
A
- blood that enters muscles transports lactic acid to liver, liver converts lactic acid into glucose
9
Q
How could you measure breathing rate?
A
- counting breaths and heart rate by taking pulse
10
Q
How would you experiment breathing rate for each exercise?
A
- take pulse after:
- sitting down for 5 min
- gentle walking for 5 min
- slow jogging for 5 min
- running for 5 min
- do as a group to reduce random errors
