Respiration - February Mock GCSE Window

Question 1

define respiration

Answer 1

respiration is the release of energy by the cells - the chemical process

Question 2

what is the source of energy for both aerobic and anaerobic respiration?

Answer 2

glucose

Question 3

does aerobic respiration use oxygen?

Answer 3

yes - anaerobic does not

Question 4

explain why anaerobic respiration does not use oxygen

Answer 4

anaerobic respiration is used in shorter activities e.g. sprinting. During vigorous exercise your body cells may not have enough oxygen for aerobic respiration to take place, and so only a short amount/short burst of energy is released

Question 5

what is the word equation for aerobic respiration?

Answer 5

glucose + oxygen —-> carbon dioxide + water
+ energy

Question 6

what is the word equation for anaerobic respiration?

Answer 6

(muscles)
glucose —> lactic acid + some energy

(yeast)
glucose —> alcohol + carbon dioxide + energy

Question 7

what are the two tests for carbon dioxide?

Answer 7

-using limewater (it will turn cloudy when you blow into it
-universal indicator (turns yellow)

Question 8

describe oxygen debt

Answer 8

• occurs during anaerobic respiration
• build up of lactic acid
• continue to breath rapidly
• an acid in the blood

The amount of oxygen required to remove the lactic acid, and replace the body’s reserves of oxygen