Anaerobic Respiration

Question 1

What takes place during exercise?

Answer 1

• The muscles use up oxygen and glucose very quickly, so the blood supply to the muscles must increase

Question 2

What does the amount of blood being circulated by the heart depend on?

Answer 2

• Not only on the heart rate, but also on the stroke volume

Question 3

What is the ‘Stroke Volume’?

Answer 3

• The volume of blood pumped out of the heart on each beat

Question 4

How do we find the ‘Cardiac Output’?

Answer 4

• Multiply heart rate x stroke volume

Question 5

What is the ‘Cardiac Output’?

Answer 5

• Volume of blood circulated by the heart in a given time

Question 6

What is the pattern in the increase of heart rate?

Answer 6

• Stroke volume also increases with exercise, so cardiac output also increases

Question 7

The cardiac output increasing produces what?

Answer 7

• It delivers more blood to respiring tissues faster