12 Respiration Flashcards
Aerobic respiration (word and chemical)
C6H12O6 + 6O2 –> 6CO2 + 6H2O
Glucose + Oxygen –> Carbon dioxide + Water
Anaerobic respiration (word and chemical)
Glucose –> lactic acid
C6H12O6 –> 2C3H6O3
Yeast Anaerobic formula
C6H12O6 –>2C2H5OH + 2CO2
Glucose –> ethanol + carbon dioxide
Anaerobic respiration definition
the chemical reactions in cells that break down nutrient molecules to release energy without using oxygen
Aerobic respiration definition
chemical reactions in cells that use oxygen to break down nutrient molecules to release energy
Which type of respiration produces more energy per glucose molecule
Aerobic respiration produces more energy per glucose molecule
where does aerobic respiration occur
mitochondria
where does anaerobic respiration occur
cytoplasm
Uses of energy in living organisms
muscle contraction, protein synthesis, cell division, active transport, growth, the passage of nerve impulses and the maintenance of a constant body temperature
what happens during vigourous excercise
lactic acid builds up in muscles and blood causing an oxygen debt
How is oxygen debt removed?
a) continuation of fast heart rate to transport lactic acid in the blood from the muscles to the liver
b) continuation of deeper and faster breathing to supply oxygen for aerobic respiration of lactic acid
c) aerobic respiration of lactic acid in the liver
oxygen debt
amount of oxygen required to remove the lactic acid and replace the body’s reserves of oxygen
Link between physical activity and rate and depth of breathing
Change in CO2 concentration in the blood (decreases pH of blood, bcs when carbon dioxide dissolves in water it becomes carboxylic acid) is detected by the brain. The brain sends impulses to the muscles to contract more.
[This is an example of negative feedback]
