Respiration

Question 1

Equation for AEROBIC respiration.

Answer 1

Glucose + Oxygen -> Carbon dioxide + Water

Question 2

Definition: Metabolism (1 mark).

Answer 2

All CHEMICAL REACTIONS that happen in an organism.

Question 3

Main responses to the increase of respiration (4 marks).

Answer 3

• Breathing rate.
  
  • increase of GAS EXCHANGE in the lungs (more O2 taken in and more CO2 released).
• Heart rate.
  
  • more blood delivers oxygen + glucose to the muscles.

Question 4

Definition: Oxygen Debt ().

Answer 4

EXTRA oxygen needed after exercise to GET OUT lactic acid.

Question 5

How to REPAY the oxygen debt (2 ways).

Answer 5

1) Blood transports lactic acid to the LIVER.
2) It reacts with oxygen to PRODUCE carbon dioxide and water.

OR

HEAVY BREATHING after exercise as it takes in more oxygen.