4.2 The Effect of Exercise On The Body

Question 1

What do you need to increase in aerobic respiration?

Answer 1

Increase the rate that oxygen and glucose reach the muscle cells, and remove the extra waste co2 faster

Question 2

What happens when the heart rate increases and the blood vessels supplying the muscles dilate?

Answer 2

More blood containing oxygen and glucose can reach the muscles

Question 3

Why do your muscles need more energy when you exercise?

Answer 3

So they can contract

Question 4

What is allowed to happen when your breathing rate and depth of each breath increase?

Answer 4

A greater uptake of oxygen and release of carbon dioxide at the lungs

Question 5

What do muscles store glucose as?

Answer 5

Glycogen

Question 6

When is the glycogen converted back into glucose?

Answer 6

Very quickly during exercise

Question 7

Why is it important to remove all the carbon dioxide from the lungs?

Answer 7

So there can be diffusion of the oxygen to the blood in the lungs. If not, then this becomes anaerobic respiration and your body will soon run out of oxygen

Question 8

Name 4 physical changes during exercise

Answer 8

• increase heart rate
• increase breathing rate
• breathe deeper
• sweat

Question 9

Name 3 long term health benefits of exercise

Answer 9

• increase efficiency of blood supply
• improved cardio and pulmonary function (reduces risk of heart disease)
• controls obesity and weight

Question 10

What is fatigue?

Answer 10

The build up of lactic acid so that you can’t move