B1.3.2 Aerobic Respiration

Question 1

Word equation for aerobic respiration

Answer 1

Glucose + oxygen = carbon dioxide + water

Question 2

Describe what is meant by the term cellular respiration

Answer 2

The process of breaking down glucose to gain energy in the form of ATP

Question 3

Where does aerobic respiration take place?

Answer 3

the mitochondria

Question 4

Is aerobic respiration exothermic or endothermic? (2)

Answer 4

During the process of respiration energy is transferred to the surroundings by heating.
This means that respiration is an exothermic reaction.

Question 5

Why do muscle cells require large numbers of mitochondria? (4)

Answer 5

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.

Question 6

What is ATP used for? (4)

Answer 6

-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.