B8 - Respiration Flashcards
What are the products of aerobic respiration?
Carbon Dioxide and Water
What are the reactants of aerobic respiration?
Glucose and Oxygen
How are muscle cells adapted for higher levels of aerobic respiration?
Greater number of mitochondria
Why does your heart rate increases during exercise?
Increase the flow of oxygenated blood to the exercising muscles.
What is the main purpose of respiration?
Release energy from glucose
How does the oxygen used for respiration enter our cells?
Diffused into the bloodstream and carried by haemoglobin
What type of reaction is aerobic respiration?
Exothermic
In which cell organelle does aerobic respiration take place?
Mitochondrion
What do our bodies need energy for?
Muscle contractions, growth and cell division
Why might aerobic respiration stop at very high temperatures?
Enzymes which control aerobic respiration become denatured.
Which produces more energy, Aerobic or Anaerobic respiration?
Aerobic
True or False: Lactic acid can cause cramp
True
What acid does Anaerobic respiration produce?
Lactic
Where does anaerobic respiration take place?
Cytoplasm
What does anaerobic mean?
Without oxygen
Equation of fermentation (anaerobic respiration by plant cells)
Glucose -> CO2 + Ethanol
Explain why anaerobic respiration is less efficient than aerobic respiration
The glucose is not completely broken down, so less energy is released by the process.
Why does breathing stay high after intense exercise?
To break down the lactic acid that has been produced
Explain how breathing rate is linked to fitness
Fit people have lower resting breathing rates that do not increase as much during exercise
Describe the effect of anaerobic respiration on cells
Production of lactic acid lowers the pH of the cell
