Respiration

Question 1

Aerobic respiration equation is?

Answer 1

glucose + oxygen ➞ carbon dioxide + water ( + energy)

Question 2

Facts about aerobic respiration.

Answer 2

• Respiration occurs in the mitochondria of cells to transfer energy.
• Glucose is absorbed from the small intestine into the blood plasma. It is transported to the cells where it diffuses in.
• Oxygen is breathed in and diffuses into the bloodstream. Oxygen is then carried by haemoglobin to the cells where it diffuses in.
• Carbon dioxide diffuses out of the cells into the blood plasma. It is transported to the lungs where it diffuses into the air sacs and is exhaled.

Question 3

What is the anerobic respiration equation?

Answer 3

glucose ➞ lactic acid ( + energy)

Question 4

Facts about anerobic repiration.

Answer 4

This occurs when there is not enough oxygen for aerobic respiration,
such as during strenuous exercise.
• It transfers less energy than aerobic respiration.
• The lactic acid produced can cause muscle cramps. This causes increased inhalation to break down lactic acid – the oxygen needed is called the oxygen debt.

Question 5

What is the fermentation equation?

Answer 5

glucose ➞ ethanol + carbon dioxide ( + energy)

Question 6

Fermentation facts.

Answer 6

Yeast respires anaerobically – this fermentation is important in food
production (e.g., bread, beer, and wine).