B2.4

Question 1

What is aerobic respiration?

Answer 1

Important enzyme-controlled processes in living things.

Provides energy.

Question 2

What is the word equation for aerobic respiration?

Answer 2

glucose+oxygen->carbon dioxide+water

+energy

Question 3

Why do mitochondria have folded inner membranes?

Answer 3

Provides a large surface area for the enzymes involved in aerobic respiration.

Question 4

3 reasons for respiration:

Answer 4

• living cells need it to carry out basic functions of life
• used to make muscles contract
• keep their bodies at a constant temperature

Question 5

Why is aerobic respiration so important?

Answer 5

Releases energy that your cells can use which is vital for everything that goes on in your body.

Question 6

Why do we produce more CO2 when we exercise hard?

Answer 6

• heart rate increases which increase the blood flow to the muscles and increases the supply of oxygen and glucose to the muscles and the rate that CO2 is removed.
• breathing rate increases so more oxygen is brought into the body and picked up your red blood cells

Question 7

What are some benefits of exercising?

Answer 7

• heart and lungs become larger

- bigger and more efficient blood supply

Question 8

How does anaerobic respiration differ from aerobic respiration?

Answer 8

Aerobic respiration uses oxygen.

Anaerobic respiration doesn’t use oxygen.

Question 9

What happens in aerobic respiration?

Answer 9

Glucose isn’t broken down completely so produces lactic acid instead of carbon dioxide and water.

Question 10

Name a cause of muscle fatigue:

Answer 10

Build up of lactic acid.

Question 11

What removes lactic acid?

Answer 11

Blood flowing through the muscles.