respiration

Question 1

respiration

Answer 1

chemical reactions in cells that breakdown nutrient molecules to release energy

Question 2

uses of energy

Answer 2

• protein synthesis
• cell division + growth
• maintenance of a constant body temperature
• active transport
• transmission of nerve impulses
• muscle contraction

Question 3

aerobic respiration

Answer 3

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

Question 4

word + chemical equation of aerobic respiration

Answer 4

glucose + oxygen → carbon dioxide + water
C6H12O6 + 6O2 → 6CO2 + 6H2O

Question 5

word + chemical equation of anaerobic respiration in yeast

Answer 5

glucose → ethanol + carbon dioxide
C6H12O6 → 2C2H5OH + 2CO2

Question 6

anaerobic respiration

Answer 6

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

Question 7

word equation of anaerobic respiration in muscle cells

Answer 7

glucose → lactic acid

Question 8

how oxygen debt develops and is repaid

Answer 8

• anaero. produces lactic acid during vigorous exercise
• oxygen debt is formed
• to repay debt breathing increases to supply oxygen for aerobic respiration
• heart beats faster to increase circulation so lactic acid can be carried to liver quickly
• in the liver lactic acid is aerobically converted to glucose