S3 Human Transport and Gas Exchange

When a person was walking or running, the following measurements were taken.

How many dm³ of air did the person breathe per minute when running at 6 km per hour?

• 18

• 36

• 60

• 108

The diagrams show the cross-section of three blood vessels, not drawn to the same scale.

What are these vessels?

• A

• B

• C

• D

A hospital patient who is feeling unwell is given a blood test

The results of the blood test show a very low level of platelets.

What effect will this have?

• The blood will be unable to transport nutrients, hormones and carbon dioxide.

• The blood will not be able to carry as much oxygen to the tissues as normal.

• There will be a greater risk of bleeding because the blood will take longer to clot.

• There will be a greater risk of infection because the blood cannot make antibodies.

The diagram shows a section through the human heart.

Which is the right atrioventricular valve?

• A

• B

• C

• D

What is the function of lymphocytes in the blood?

• antibody production

• blood clotting

• phagocytosis

• transport of hormones

The diagram shows a cross-section through a human blood vessel. Which type of blood vessel does the diagram show?

• a ventricle

• a vein

• a capillary

• an artery

Compared with atmospheric air, air breathed out by a human contains

• less water vapour, less carbon dioxide

• less water vapour, more carbon dioxide

• more water vapour, less carbon dioxide

• more water vapour, more carbon dioxide

What describes the actions of the intercostal muscles and the diaphragm when we breathe out?

• A

• B

• C

• D

Which blood vessel contains valves?

• arteriole

• capillary

• renal artery

• renal vein

When blood is flowing through a vena cava, which main blood vessel will it flow through next?

• hepatic portal vein

• hepatic vein

• pulmonary artery

• pulmonary vein