Respiration Flashcards
(23 cards)
What does Respiration mean?
Respiration involves chemical reactions that break down nutrient molecules in living cells to release energy.
What is aerobic respiration?
The energy supplied by breaking down glucose in the presence of oxygen
Where does respiration take place?
Mitochondria.
What type of reaction is respiration?
Exothermic reaction as it releases energy.
What is the word equation for areobic respiration?
Glucose+oxygen–>Carbon dioxide+water
Why does aerobic respiration release a great amount of energy?
Because the glucose molecule has been fully oxidised.
What is anaerobic respiration?
anaerobic respiration does not need oxygen. It is the release of a relatively small amount of energy in cells.
Why is the energy in anaerobic respiration low?
Because the glucose molecule has not been fully broken down yet meaning that it transfers much less energy.
What is the word equation for anaerobic respiration?
glucose–>latic acid + energy
Where else can anaerobic respiration take place?
It can also take place in plant and yeast cells.
What is the equation for anaerobic respiration in plants and yeast?
Glucose–> ethanol+carbon dioxide
What is the chemical formulae for ethanol?
C2H5OH
What is anaerobic respiration in yeast called?
Fermentation
How is fermentation to make beer or alcoholic drinks?
The alcohol contains ethanol which is produced by fermentation.
How is fermentation used to make bread?
This is because the carbon dioxide produced creates bubbles in the dough causing it to rise.
What happens to our body during exercise?
The body needs a great deal of energy for muscle contraction.
How does our body provide more oxygen during exercise?
Our heart rate, breathing rate and breath volume all increase. We breathe more frequently and take deeper breaths.
What respiration do we use during heavy exercise?
Anaerobic respiration.
What does the use of anaerobic respiration cause?
Lactic acid build-up and oxygen debt.
What does lactic acid do to our muscles?
It causes them to hurt and stops them from contracting efficiently.
What happens after exercise?
We still are out of breath as the oxygen debt is being repaid.
What happens to the latic acid in our body?
Blood flowing through the muscle transports the lactic acid to the liver where it is broken down.
What is the oxygen debt?
It is the amount of extra oxygen the body needs after exercise to react with the lactic acid and remove it from the cells.
