B1.3.2 Aerobic Respiration Flashcards
What is respiration?
Respiration is the process that involves chemical reactions that break down nutrient molecules in living cells to release energy.
What is aerobic respiration?
The release of a relatively large amount of energy in cells by the breakdown of food substances in the presence of oxygen.
What is the word equation for aerobic respiration?
Glucose + oxygen —> carbon dioxide + water
What is the symbol equation for aerobic respiration?
C6H1206+ 602 —> 6C02 + 6H20
The reaction transfers energy from its chemical energy store in glucose to another chemical energy store for all processes in the cell. What is this energy store called?
ATP (Adenosine Triphosphate)
What is ATP used for? (4)
-To synthesise larger molecules from smaller ones to make new cell material.
-For movement: animals use it to contract muscle cells enabling the organism to move.
-To stay warm: when an animal’s surroundings are colder than they are, they increase their rate of respiration.
-This transfers more energy by heating, so that they can keep their body at a constant temperature.
Where does aerobic respiration take place?
In the mitochondria
Is aerobic respiration exothermic or endothermic? (2)
During the process of respiration energy is transferred to the surroundings by heating.
This means that respiration is an exothermic reaction.
State the products of aerobic respiration and their formulae:
Carbon dioxide (6CO2) and water (6H20)
Why do muscle cells require large numbers of mitochondria? (4)
They are more active than other cells, as they are used almost constantly for movement.
This means they require high levels of energy being produced,
And as respiration occurs in the mitochondria, energy is released
So the more mitochondria there are - the more energy being provided.
What kind of reaction is respiration?
Exothermic
