4.2.2 The Response To Exercise Flashcards
Why do muscles need .ore oxygen if they exercise?
They are contracting/ respiration more during exercise
Glycogen
Store of sugar
How can glycogen be used by muscles during exercise?
Broken down into glucose for respiration
What happens to muscle contractions during exercise
Contract harder and faster
What happens to the glycogen store during exercise?
Breaks down into glucose
What happens to the heart rate during exercise?
Increases
What happens to the arteries supplying the muscles with blood during exercise?
They widen
What happens to breathing rate during exercise?
Increases
What happens to the depth of breathing during exercise?
Increases
Why do muscles contract more during exercise?
It allows you to move faster or lift heavier
Why do glycogen stores break down during exercise
Glucose is used for respiration
Why does heart rate increase during exercise? (2p)
- Delivers more oxygen and glucose to muscles
- Removes CO2
Why do arteries widen during exercise
Delivers more oxygen and glucose to muscles
Why does the breathing rate and breathing depth increase during exercise?
Greater supply of oxygen for respiration and also remove more CO2
Why does the volume of the heart at rest increase as a result of long-term exercise? (2p)
- Each beat pumps more blood
- So more oxygen and glucose
Why does the volume of blood pumped by each heart beat increase as a result of long-term exercise? (2p)
- Heart is stronger
- More oxygen and glucose pumped
Why does the resting heart rate decrease as a result of long-term exercise? (2p)
- Heart doesn’t have to work as hard
- Less strain on the heart
Why does the maximum lung volume increases as a result of long-term exercise?
- More oxygen inhaled and more CO2 exhaled
Why does the resting breathing rate decrease as a result of long-term exercise?
Less strain on the lungs as it doesn’t have to work as hard
