Respiration (Rev3)

Question 1

What type of reaction is cellular respiration?

How often does it occur in living cells?

Answer 1

An exothermic reaction

Happens continuously in living cells

Question 2

Aerobic respiration summarised:

Answer 2

Glucose + oxygen —-> C02 + water

Energy transferred to the environment

Question 3

What does the energy transferred supply?

Answer 3

All the energy needed for living processes

Question 4

Effects of exercise on respiration and why

Answer 4

Increases:
Breathing rate as more oxygen is needed
Heart rate as oxygen needs to be pumped faster around the body
Blood movement as more oxygen needs to be delivered to muscles

Question 5

Anaerobic respiration

Answer 5

Respiration without any oxygen

Question 6

Comparison between aerobic and anaerobic respiration

Answer 6

Aerobic respiration includes oxygen however anaerobic respiration does not. Aerobic respiration produces carbon dioxide and water from using glucose and oxygen however anaerobic respiration only uses glucose and produces lactic acid that builds up in muscles.

Question 7

Comparison of anaerobic respiration in animals, bacteria and yeast

Answer 7

In animals such as humans and bacteria cells anaerobic respiration produces lactic acid. In
Yeast cells produce ethanol and carbon dioxide