The Respiratory System - JC Science (2)

Name the part of the breathing system represented by the tube labelled X.

• Oesophagus

• Tube

• Trachea

• Throat

Name the part of the breathing system represented by the balloons labelled Y.

• Lungs

• Kidneys

• Bronchi

• Stomach

Describe what happens to the balloons (Y) when the rubber sheet (diaphragm) is pulled down.

• They inflate

• They deflate

• Nothing happens

What part of the respiratory system does label A represent?

• Lung

• Trachea

• Alveoli

• Mouth

What part of the respiratory system does label B represent?

• Lung

• Trachea

• Alveoli

• Mouth

What part of the respiratory system does label C represent?

• Lung

• Trachea

• Alveoli

• Mouth

During gaseous exchange in the lungs, gas X leaves the blood vessel and enters an alveolus. At the same time, gas Y leaves the alveolus and enter the blood vessel.

Name gas Y.

• Carbon Dioxide

• Oxygen

• Water Vapour

• Hydrogen

A student exhaled air into test tube X. After a while, liquid A turned a cloudy white colour.

Name liquid A.

• Tap water

• Deionised water

• Limewater

• Lemonwater

A student exhaled air into test tube X. After a while, liquid A turned a cloudy white colour.

Why did liquid A turn cloudy white in test tube X?

• Because oxygen is present in exhaled air

• Because carbon dioxide is present in exhaled air

• Because hydrogen is present in exhaled air

• Because carbon monoxide is present in exhaled air

The diagram shows the structure of the human lung. Air passes in and out of the lungs, via the trachea, bronchi, and bronchioles. Gaseous exchange takes place in the structure labelled A.

Name structure A.

• Epiglottis

• Alveolus

• Diaphragm

• Intercostal muscle