HARD
Upper Secondary: IGCSE
IMPORTANT
Earn 100

List three features of gas exchange surfaces.

Important Questions on Respiration and Gas Exchange

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 2
Explain how each feature in your lungs helps gas exchange to happen efficiently.
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 3

Copy and complete this table to summarise what happens during breathing.

  Breathing in Breathing out
External Intercostal muscles    
Diaphragm Muscles    
Volume of Thorax    
Pressure in Lungs    
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 4
Describe in detail the pathway of an oxygen molecule as it moves from the air outside your body into your blood and to a cell in a muscle in your arm. You could write your answer in words or use a flow diagram or perhaps a mixture of both.
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 5

A girl breathed into a machine that recorded the volume of the air that she breathed in and out. The results were recorded as a graph of volume against time. The diagrams show results obtained when she was resting and when she was exercising. Question Image

Use the first graph to find how many breaths per minute the girl took while she was resting.

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 5

A girl breathed into a machine that recorded the volume of the air that she breathed in and out. The results were recorded as a graph of volume against time. The diagrams show results obtained when she was resting and when she was exercising. Question Image

Use the second graph to find how many breaths per minute the girl took while she was resting.

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 5

A girl breathed into a machine that recorded the volume of the air that she breathed in and out. The results were recorded as a graph of volume against time. The diagrams show results obtained when she was resting and when she was exercising. Question Image

Use the first graph to find the volume of the first breath that she took while she was resting.(Remember to include the unit in your answer)

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 5

A girl breathed into a machine that recorded the volume of the air that she breathed in and out. The results were recorded as a graph of volume against time. The diagrams show results obtained when she was resting and when she was exercising. Question Image

Use the second graph to find the volume of the first breath that she took while she was exercising.(Remember to include the unit in your answer)

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 11 - Respiration and Gas Exchange>End-of-chapter questions>Q 5

A girl breathed into a machine that recorded the volume of the air that she breathed in and out. The results were recorded as a graph of volume against time. The diagrams show results obtained when she was resting and when she was exercising. Question Image

Explain how these changes in the rate and depth of breathing helped the girl to do the exercise.