B9

Question 1

What is cellular respiration

Answer 1

An exothermic reaction that takes place in a cell or in the body

Question 2

Aerobic respiration word equation

Answer 2

Glucose + oxygen = carbon dioxide + water

Question 3

What is an exothermic reaction

Answer 3

Transverse energy to the enviroment

Question 4

Where do exothermic reactions take place

Answer 4

Mitochondria

Question 5

Give 3 examples for the need of respiration

Answer 5

For synthesis reactions
To break larger molecules into smaller ones
To contract muscles

Question 6

Give 3 examples for the body’s response to exercise

Answer 6

Increase in heart rate, breathing rate and breath volume
Increase of oxygenated blood flow
To make glucose

Question 7

What do the body’s responses to exercise aim to do

Answer 7

Increase the supply of glcse + o2 and the removal of co2

Question 8

What happens when insufficient oxygen is supplied

Answer 8

Incomplete oxidation of glucose - build up of lactic acid - causes oxygen debt - stops muscles contracting efficiently

Question 9

What is oxygen debt

Answer 9

Amount of extra oxygen the body needs after exercise to react with the built up lactic acid to remove it

Question 10

What happens to lactic acid after exercise

Answer 10

Transported to the liver - turned to glucose

Question 11

When does anaerobic respiration start

Answer 11

Muscles work hard for a long time - don’t contract efficiently - if not enough oxygen - respires anaerobically

Question 12

What is anaerobic respiration

Answer 12

Respiration without oxygen - glucose incompletely broken down to form lactic acid

Question 13

What does anaerobic respiration in plants do

Answer 13

Production of co2

Question 14

Anaerobic respiration muscles word equation

Answer 14

Glucose = lactic acid

Question 15

Why is aerobic more effective than anaerobic

Answer 15

Aerobic breaks down glucose completely

Question 16

Anaerobic in plants word equation

Answer 16

Glucose = ethanol + co2

Question 17

Anaerobic respiration is yeast cells

Answer 17

Fermentation - has economic importance in the making of bread and alcohol

Question 18

What is metabolism

Answer 18

Sum of all the reactions in a cell pr in the body

Question 19

What is the energy transferred from respiration in metabolism used for

Answer 19

For continual enzyme controlled process of metabolism that makes new molecules

Question 20

Name 3 metabolic reactions

Answer 20

The conversion to starch, glycogen and cellulose
Formation of lipids from glycerol and to 3 fatty acid molecules
Use of nitrate ions to form amino acids and proteins

Question 21

Give 3 roles of the liver

Answer 21

Detoxifying poisonous substances like ethanol
Passing the breakdown of products to the blood so they can be excreted
Storing iron from breaking down old/worn out blood cells

Question 22

Describe how stored glycogen can provide glucose to respiring cells in a different part of the body.

Answer 22

Glycogen is broken down into glucose
Glucose diffuses into the blood
Dissolved glucose travels through the bloodstream
Diffuses into respiring cells

Question 23

Why was a layer of oil put on top of the yeast and sugar solution.

Answer 23

So that no oxygen could escape