Respiration - How Cells Get Their Energy (Sept 30)

Question 1

What’s the food called for cells?

Answer 1

ATP

Question 2

Respiration

Answer 2

Chemical reaction taking place in cells, where glucose is broken down to release energy

Question 3

Aerobic respiration

Answer 3

Reaction that releases energy from food. 38 ATP
-uses oxygen, produces carbon dioxide and water

Glucose + O2 —> CO2 + H2O
👇
(C6, H12, O6)

Question 4

ATP ( adenosine triphosphate)

Answer 4

Chemical present in all cells, which acts as an energy „currency”.
ATP is made by respiration and used up by any processes that needs a supply of energy

Question 5

Anaerobic respiration

Answer 5

Reaction that releases energy from food, without using oxygen.
Produces lactate in mammals, carbon dioxide and ethanol in yeast.

• glucose is not completely broken down -> less energy released-2 ATP

Question 6

Anaerobic respiration (yeast-formula)

Answer 6

Glucose —> ethanol + carbon dioxide

C6,H12,O6 —> C2,H5,OH + CO2

Question 7

Anaerobic respiration (muscle-formula)

Answer 7

C6,H12,O6 —> C3,H6,O3
Glucose -> lactate (+ some energy)

• happens when a person does a „burst” of activity, such as sprint
• provides enough energy to keep the overworked muscles working

Question 8

Oxygen debt

Answer 8

The volume of oxygen needed to completely oxidise the lactate built up during a period of anaerobic respiration.

Question 9

Oxidation reaction

Answer 9

It’s called respiration, because oxygen is used