B8 Gas Exchange in Mammals Quiz

1

What helps oxygen to be absorbed rapidly into the blood in the lungs?

1

The diagram shows some of the structures in a human lung.

Where is the carbon dioxide concentration highest?

1

A girl holds her breath for 30 seconds, breathes out, and then breathes in.
Compared with the air she breathes out, the air she breathes in contains less .......

1

What makes alveoli suitable as a gas exchange surface?

1

The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30
seconds.

Which graph shows changes in the volume of air in the lungs of the same person immediately
after they have done five minutes of vigorous exercise?

1

A sample of expired air is collected in a gas jar. Another gas jar contains normal atmospheric air.
A lighted candle is placed inside each gas jar as shown. The time taken for each flame to go out is measured. As the candles burn they use up the oxygen available in the jar.
The table shows the results of this experiment.
The candle flame in jar X goes out in 15 seconds, while the candle flame in jar Y goes out in 9 seconds.

What is an explanation of the difference between the results in jars X and Y?

1

The diagram shows a section through an alveolus and a capillary.

Why does carbon dioxide move from X to Y?

1

The diagram shows some structures in the human neck and thorax.
The lining of tube Q has cilia.

What is an important function of the cilia?

1

The diagram shows some ciliated cells from the trachea.

What is the function of the parts labelled X?

1

What are the functions of the diaphragm and the cilia in the human gas exchange system?

1

The diagram shows changes in air pressure inside the lungs during a complete cycle of
breathing. Atmospheric pressure is 101 kPa.

Which position on the graph marks the point at which the ribs are beginning to be raised?

1

The diagram shows someone blowing up a balloon.

What percentage of the gas in the balloon is carbon dioxide?

1

What increases the rate of diffusion of oxygen into red blood cells in the lungs?

1

From the graph, when did the person begin a period of vigorous exercise after resting?

1

The diagram represents the exchange of gases during breathing and during respiration in the body.

What is represented by X and by Y?

1

Which route is taken by air passing into the lungs of a human?

1

What are features of gaseous exchange surfaces in mammals?

1

The ribs are lowered as we breathe out.

Which characteristic of living organisms does this illustrate?

1

What is the order of decreasing diameter of the structures found in the breathing system?

1

The diagram shows the main structures in the breathing system.

Which row identifies the larynx, bronchus, trachea and bronchioles?

Quiz on IGCSE Coordinated Sciences Topic B8 Gas Exchange in Mammals

B8 Gas Exchange in Mammals Quiz

What helps oxygen to be absorbed rapidly into the blood in the lungs?

The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest?

A girl holds her breath for 30 seconds, breathes out, and then breathes in. Compared with the air she breathes out, the air she breathes in contains less .......

What makes alveoli suitable as a gas exchange surface?

The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30 seconds. Which graph shows changes in the volume of air in the lungs of the same person immediately after they have done five minutes of vigorous exercise?

The diagram shows a section through an alveolus and a capillary. Why does carbon dioxide move from X to Y?

The diagram shows some structures in the human neck and thorax. The lining of tube Q has cilia. What is an important function of the cilia?

The diagram shows some ciliated cells from the trachea. What is the function of the parts labelled X?

What are the functions of the diaphragm and the cilia in the human gas exchange system?

The diagram shows changes in air pressure inside the lungs during a complete cycle of breathing. Atmospheric pressure is 101 kPa. Which position on the graph marks the point at which the ribs are beginning to be raised?

The diagram shows someone blowing up a balloon. What percentage of the gas in the balloon is carbon dioxide?

What increases the rate of diffusion of oxygen into red blood cells in the lungs?

From the graph, when did the person begin a period of vigorous exercise after resting?

The diagram represents the exchange of gases during breathing and during respiration in the body. What is represented by X and by Y?

Which route is taken by air passing into the lungs of a human?

What are features of gaseous exchange surfaces in mammals?

The ribs are lowered as we breathe out. Which characteristic of living organisms does this illustrate?

What is the order of decreasing diameter of the structures found in the breathing system?

The diagram shows the main structures in the breathing system. Which row identifies the larynx, bronchus, trachea and bronchioles?

The diagram shows some of the structures in a human lung.

Where is the carbon dioxide concentration highest?

A girl holds her breath for 30 seconds, breathes out, and then breathes in.
Compared with the air she breathes out, the air she breathes in contains less .......

The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30
seconds.

Which graph shows changes in the volume of air in the lungs of the same person immediately
after they have done five minutes of vigorous exercise?

The diagram shows a section through an alveolus and a capillary.

Why does carbon dioxide move from X to Y?

The diagram shows some structures in the human neck and thorax.
The lining of tube Q has cilia.

What is an important function of the cilia?

The diagram shows some ciliated cells from the trachea.

What is the function of the parts labelled X?

The diagram shows changes in air pressure inside the lungs during a complete cycle of
breathing. Atmospheric pressure is 101 kPa.

Which position on the graph marks the point at which the ribs are beginning to be raised?

The diagram shows someone blowing up a balloon.

What percentage of the gas in the balloon is carbon dioxide?

The diagram represents the exchange of gases during breathing and during respiration in the body.

What is represented by X and by Y?

The ribs are lowered as we breathe out.

Which characteristic of living organisms does this illustrate?

The diagram shows the main structures in the breathing system.

Which row identifies the larynx, bronchus, trachea and bronchioles?