2- Energy From Respiration

Question 0

What is the equation for aerobic respiration?

Answer 0

Glucose + oxygen –> carbon dioxide + water [+energy]

Question 1

Where does aerobic respiration take place and what controls it?

Answer 1

In the mitochondria and is controlled by enzymes

Question 2

What could the energy released by aerobic respiration be used for?

Answer 2

Build larger molecules from smaller ones
Enable muscle contraction (animals)
Maintain constant body temperature in colder surroundings (mammals)
Build sugars, nitrates and other nutrients into amino acids then proteins (plants)

Question 3

Generally, how is aerobic respiration usually measured?

Answer 3

Measure the volume of carbon dioxide by using limewater (turning cloudy)

Question 4

What happens in the body when you exercise (in terms of aerobic respiration)?

Answer 4

Oxygen and glucose need to get to the contracting muscles quicker and waste needs to be removed faster.
Heart rate increases and blood vessels dilate.
Glycogen is converted back to glucose

Question 5

Why do muscles start to respire anaerobically?

Answer 5

They cannot get enough oxygen for aerobic respiration

Question 6

Why is lactic acid produced during anaerobic respiration?

Answer 6

Glucose is not completely broken down (causes muscles fatigue)

Question 7

What removes lactic acid from the muscles?

Answer 7

Blood flowing through the muscles oxidises lactic acid into carbon dioxide and water