Topic A: Energy

Question 1

energy needed for

Answer 1

respiration, movement, heat conservation

Question 2

anaerobic

Answer 2

release of a relatively small amount of energy by the breakdown of food substances without using oxygen

Question 3

aerobic

Answer 3

release of a relatively large amount of energy in cells but the break down of food molecules using Oxygen

Question 4

lactic acid

Answer 4

when muscles are working vigorously, they stop receiving oxygen properly & undergo the process of anaerobic respiration. As a consequence, lactic acid accumulates in the muscles leading them to be sore. Therefore, breathing rate goes up to increase oxygen in muscles.

Question 5

respiration

Answer 5

the chemical reactions that break down nutrients molecules in living cells to release energy