B12 - Respiration Flashcards
uses of energy (6)
muscle contraction
protein synthesis
cell division
growth
passage of nerve impulses
maintenance of a constant body temperature
aerobic respiration definition
the chemical reactions in cells that use oxygen to break down nutrient molecules to release enrgy
word equation of aerobic respiration
glucose + oxygen –> carbon dioxide + water
balanced symbol equation for aerobic respiration
C6H12O6 + 6O2 –> 6CO2 + 6H2O
anaerobic respiration definition
the series of chemical reactions in cells that break down nutrient molecules to release energy without using oxygen
relative energy released from aerobic compared to anaerobic respiration
aerobic respiration releases much more energy per glucose molecule than anaerobic respiration
word equation for anaerobic respiration
glucose –> lactic acid
where does anaerobic respiration happen
in muscles during vigorous exercise
what happens when you do anaerobic respiration
lactic acid builds up in muscles and blood during vigorous exercise causing an oxygen debt
explain how the oxygen debt is removed after exercise (3)
continuation of fast heart rate that transports lactic acid from 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
effects of lactic acid build up in your muscles (2)
fatigue
cramps
oxygen debt meaning
the oxygen needed to oxidise/respire/breakdown the lactic acid leftover from strenuous exercise
why does breathing and heart rate increase during exercise (5)
when you exercise, your muscles contract more
to contract more, the muscles need more energy
to get more energy, the muscles need to respire more
to respire more, the muscles need more oxygen
to get more oxygen, breathing and heart rate increases
