B9 respiration

Question 1

aerobic respiration equation

Answer 1

glucose + oxygen -> CO2 + water

C6 H12 O6 + 6 O2 -> 6 CO2 + 6 H2 O

Question 2

need for respiration

Answer 2

synthesis reactions
muscle contractions in animals
maintain body temp
used in active transport (root hair cells)

Question 3

responses to exercise

Answer 3

increased heart rate, breathing rate and volume
glycogen stores converted to glucose for cellular respiration
flow of oxygenated blood to muscles increases
increased rate of removal of waste products from muscles ( CO2)

Question 4

anaerobic respiration in animals

Answer 4

glucose -> lactic acid

not as efficient as aerobic -> glucose not broken down completely

Question 5

cause of muscle fatigue

Answer 5

build up of lactic acid in muscle cells

creates oxygen debt

Question 6

what is oxygen debt

Answer 6

amount of oxygen needed to convert lactic acid back into glucose (in the liver)

Question 7

anaerobic respiration in plants

Answer 7

glucose -> ethanol + carbon dioxide

energy transferred to environment

Question 8

metabolism

Answer 8

sum of all the reactions in the body

Question 9

metabolic reactions

Answer 9

glucose -> starch,cellulose + glycogen
formation of lipid molecules
respiration reaction
photosynthesis reaction
glucose + nitrate ions -> amino acids -> proteins

Question 10

role of liver

Answer 10

detoxifying poisonous substances
passing breakdown products into blood
breaking down old, worn out blood cells and storing iron until needed to make new blood cells
removing lactic acid

Question 11

use of amino acids

Answer 11

synthesise proteins

breakdown excess proteins to form urea