B9-Respiration

Question 1

Describe the effects of exercise on respiration

Answer 1

It increases the breathing rate

Question 2

Explain the effects of exercise on respiration

Answer 2

The heart rate increases during exercise. The rate and depth of breathing increases - this makes sure that more oxygen is absorbed into the blood, and more carbon dioxide is removed from it.

Question 3

Compare aerobic to anaerobic respiration

Answer 3

Anaerobic respiration is less efficient, produces much less energy and creates an ‘oxygen debt’. However it is good for short periods of time where bursts or energy are required

Question 4

What is anaerobic respiration

Answer 4

Respiration without the use of oxygen

Question 5

Compare anaerobic respiration in animals, bacteria and yeast

Answer 5

when plants respire anaerobically instead of lactic acid they produce ethanol (and carbon dioxide), this is the same with other microorganisms like yeast
- however some microorganism still produce lactic acid during anaerobic respiration, for example the bacteria used to form yoghurts