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
• the maintenance of a constant body temperature

Question 2

define aerobic respiration

Answer 2

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

Question 3

write it down

aerobic respiration word equation

Answer 3

glucose + oxygen –> carbon dioxide + water

Question 4

aerboic respiration chemical equation

Answer 4

C6H12O6 –> 6CO2 + 6H20

Question 5

define anaerobic respiration

Answer 5

• chemical reactions in cells
• that break nutrient molecules
• to release energy
• without using oxygen.

Question 6

write it down

anaerobic respiration word equation
in muscles during vigorous exercising

Answer 6

glucose –> lactic acid

Question 7

write it down

anaerobic word equation
in yeast

Answer 7

glucose –> alcohol + carbon dioxide

Question 8

write it down

anaerobic chemical equation
in yeast

Answer 8

C6H12O6 → 2C2H5OH + 2CO2

Question 9

Give the advantage of using aerobic rather than anaerobic respiration

Answer 9

anaerobic respiration releases much less energy per glucose molecule then aerobic respiration
* useful in excercising when it allows you to keep on using ur muscles for while longer

Question 10

What’s an oxygen debt?

Answer 10

Lactic acid builds up in muslces & blood during vigorous excercise causing an oxygen debt.

Question 11

Outline how the oxygen debt is removed after
exercise

Answer 11

1. High heart rate to transport lactic acid from muscles to liver
2. High breathing rate to provide oxygen
3. to breakdown lactic acid by aerobic respiration to carbon dioxide & water
4. lactic acid is broke down in the liver