Respiration (aerobic & anaerobic):

Question 1

Key points

Question 2

Respiration is a chemical reaction which occurs in all living cells

Answer 2

releasing energy from glucose.

Question 4

Aerobic respiration occurs with oxygen and releases more energy but more slowly.

Question 6

Anaerobic respiration occurs without oxygen and releases less energy but more quickly.Aerobic respiration

Question 8

Respiration

Question 9

is not breathing. That is called

Question 10

ventilation

Question 11

. Respiration is a chemical reaction which occurs in every one of the cells in the human body. It releases energy stored in glucose and without it

Answer 11

these cells would die.

Question 13

Aerobic respiration occurs in the presence of oxygen. The equation for aerobic respiration is:

Question 15

glucose + oxygen → carbon dioxide + water

Question 18

Aerobic

Question 19

respiration slowly releases lots of energy stored in

Question 20

glucose

Question 21

. It mostly occurs in tiny parts of your cells called mitochondria which are found in the

Question 22

cytoplasm

Question 23

. Cells which need more energy like sperm cells

Answer 23

which swim

Question 24

mitochondria

Question 25

.

Question 27

Three question marks

Question 28

Did you know?

Question 30

‘Aerobic’ does not mean ‘in air’ even though they sound the same. It means 'in the presence of oxygen.'Anaerobic respiration

Question 31

For a short period during vigorous exercise

Answer 31

the body’s cells may not have enough oxygen. This means aerobic respiration cannot occur and anaerobic respiration happens instead. The equation for anaerobic respiration is:

Question 33

glucose → lactic acid

Question 36

Anaerobic

Question 37

respiration releases less energy than aerobic respiration but it does this faster. The product of this reaction is lactic acid. This builds up in muscles causing pain and tiredness

Answer 37

which can lead to a cramp.

Question 39

After vigorous exercise

Answer 39

people continue to breathe deeply and quickly for a short period. This is called excess post-exercise oxygen consumption or EPOC. It used to be called ‘oxygen debt.’ During this time