Response to Exercise

Question 1

How does the body react to the increased demand of energy during exercise ?

Answer 1

By:
Increasing breathing volume
Increasing breathing rate
Increasing heartrate

Question 2

How does increasing breathing volume satisfy the increased demand for energy during excercise?

Answer 2

It supplies the muscle cells with the oxygen required for aerobic respiration

Question 3

How does increasing breathing rate satisfy the increased demand for energy during excercise?

Answer 3

It supplies the muscle cells with the oxygen required for aerobic respiration

Question 4

How does increasing heartrate satisfy the increased demand for energy during excercise?

Answer 4

It pumps oxygenated blood to the muscle cells to supply the oxygen required for aerobic respiration

Question 5

What happens if an insufficient supply of oxygen is supplied to the muscle cells?

Answer 5

Anaerobic respiration occurs

Question 6

How does a build up of lactic acid affect exercise?

Answer 6

The lactic acid build up after long periods of exercise causes the muscles to become fatigued and this makes the muscle contractions inefficient

Question 7

How is lactic acid removed from muscle cells during recovery from excercise?

Answer 7

Blood transports the lactic acid from the muscle cells to the liver
In the liver the lactic acid is converted into glucose
This reaction requires oxygen

Question 8

What is oxygen debt?

Answer 8

The amount of extra oxygen the required by the body to react with the accumulated lactic acid and remove it from muscle cells

Question 9

Why is it that athletes will continue to breathe heavily after excercise?

Answer 9

Lactic acids build up in the muscle cells after anaerobic respiration

This creates oxygen debt and so the body reacts to make the athlete breathe heavily

So the oxygen oxidises the accumulated lactic acid

To produce carbon dioxde and water