Respiration

Question 1

State the uses of energy in living organisms

Answer 1

muscle contraction
protein synthesis
cell division
active transport
growth
the passage of nerve impulses and the maintenance
of a constant body temperature

Question 2

Describe aerobic respiration

Answer 2

the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy

Question 3

State the word equation for aerobic respiration

Answer 3

glucose + oxygen → carbon dioxide + water

Question 4

State the balanced chemical equation for aerobic
respiration

Answer 4

C6H12O6 + 6O2 → 6CO2 + 6H2O

Question 5

Describe anaerobic respiration

Answer 5

the chemical reactions in cells that break down nutrient
molecules to release energy without using
oxygen

Question 6

Does anaerobic respiration release more or less energy per glucose compared to aerobic respiration?

Answer 6

anaerobic respiration releases much
less energy per glucose molecule than aerobic
respiration

Question 7

State the word equation for anaerobic respiration
in yeast

Answer 7

glucose → alcohol + carbon dioxide

Question 8

State the balanced chemical equation for
anaerobic respiration in yeast

Answer 8

C6H12O6 → 2C2H5OH + 2CO2

Question 9

State the word equation for anaerobic respiration
in muscles during vigorous exercise

Answer 9

glucose → lactic acid

Question 10

where does lactic acid build up and how?

Answer 10

lactic acid builds up in muscles and
blood during vigorous exercise causing an oxygen
debt

Question 11

Outline how the oxygen debt is removed after
exercise

Answer 11

• continuation of fast heart rate to transport
  lactic acid in the blood from the muscles to
  the liver
• continuation of deeper and faster breathing
  to supply oxygen for aerobic respiration of
  lactic acid
• aerobic respiration of lactic acid in the liver