B9

Question 1

What reacts in aerobic respiration

Answer 1

Glucose and oxygen

Question 2

Products of aerobic respiration

Answer 2

Carbon dioxide and water

Question 3

Is aerobic exothermic or endothermic

Answer 3

Exothermic

Question 4

Word equation for aerobic respiration

Answer 4

Glucose + oxygen -> water + carbon dioxide

Question 5

Symbol equation for aerobic respiration

Answer 5

C6H12O6 + 6O2 -> 6CO2 + 6H2O

Question 6

Symbol equation for glucose

Answer 6

C6H12O6

Question 7

Where does aerobic respiration take place

Answer 7

Mitochondria

Question 8

Muscle relationship with respiration

Answer 8

More muscles mean more cells so more mitochondria to do respiration

Question 9

Why do we need to respire

Answer 9

• to carry out basic functions of life (build larger molecules and break them down into smaller ones)
• to make muscles contract (including the heart)
• to maintain a body temperature
• in plants to transfer minerals into plant via active transport

Question 10

Where and how is glucose stored

Answer 10

In muscles as glycogen

Question 11

How does muscle activity change during physical activity

Answer 11

Contract harder and faster so need more energy therefore need more glucose and oxygen, they also produce more carbon dioxide and water which needs to be removed efficiently

Question 12

Change to heart rate during exercise

Answer 12

Increases to increase blood flow and oxygen supply to muscles and increase rate of removal of waste products from muscles

Question 13

Change to breathing rate during exercise

Answer 13

Increases amount of oxygen supplied to body and carbon dioxide is removed from bloodstream quicker from lungs

Question 14

Change to glycogen during exercise

Answer 14

Converts to glucose to provide muscles with the fuel it needs to respire

Question 15

Product of anaerobic respiration

Answer 15

Lactic acid

Question 16

Word equation for anaerobic respiration

Answer 16

Glucose -> lactic acid

Question 17

What is an oxygen debt

Answer 17

After exercise, lactic acid needs to be converted back to glucose, this requires oxygen so after exercise, your heart and breathing rates stay high to produce the oxygen to repay the debt

Question 18

Anaerobic respiration in plants

Answer 18

Glucose -> ethanol + carbon dioxide

Question 19

What is the metabolism

Answer 19

Sum of all reactions in cell or body

Question 20

Examples of metabolic reactions

Answer 20

• respiration
• photosynthesis
• glucose to glycerol, starch and cellulose
• formation of proteins
• breakdown of proteins to form urea

Question 21

Metabolic functions of liver

Answer 21

Detoxifying poisonous substances
Passing breakdown products into blood to be excreted via kidneys
Breaking down old blood cells and storing the iron until new ones are formed

Question 22

How is lactic acid removed

Answer 22

Transported to liver via bloodstream and then turned back into glucose, if it isn’t needed then it is turned into glycerol and stored in the liver

Question 23

When is the oxygen debt repaid

Answer 23

When the lactic acid is fully converted back into glucose which is then used in aerobic respiration to produce water and carbon dioxide

Question 24

What does the hepatic vein do

Answer 24

Carries blood from liver to Hearst with amounts of food adjusted

Question 25

What does the hepatic artery do

Answer 25

Brings oxygenated blood to liver

Question 26

What does the hepatic portal vein do

Answer 26

Carries blood containing digested food from intestine to liver