Respiration TYS G2

Four identically sized samples of lung tissue are compared. Which sample is the best adapted for gaseous exchange?

• A

• B

• C

• D

Structure X has areas of cartilage.

What is structure X?

• alveolus

• bronchus

• larynx

• trachea

A student wrote this equation for aerobic respiration in humans.

Which substance is NOT correct?

• carbon dioxide

• glycogen

• oxygen

• water

An athlete runs a race. The graph shows how the lactic acid concentration in his leg muscle changes.

For how long did the athlete run?

• 2 min

• 4 min

• 6 min

• 10 min

Which are the characteristics of alveoli that improve gas exchange?

• A

• B

• C

• D

A boy feels pain and tiredness in his legs after running to school.

What is a possible cause of this?

• Glucose has turned to glycogen in his legs

• lactic acid has built up in his muscles

• the exercise has increased his heart rate

• urea has formed in his blood

Which word equation represents ANAEROBIC respiration in muscles?

• A

• B

• C

• D

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

• A

• B

• C

• D

The graph shows the variation in the concentration of lactic acid in the muscles of an athlete during and after a 400m race.

At which point did the race finish?

• A

• B

• C

• D