Chapter 2 (Science form 3)

Which of the following processes occurs during inhalation?

• Diaphragm flattens.

• Rib cages moves upwards and inwards.

• Pressure in the thoracic cavity increases.

• Volume in thoracic cavity decreases.

Diagram 1 shows part of the human respiratory system. What is X?

• Bronchus

• Trachea

• Bronchiole

• Alveolus

Where does the exchange of oxygen and carbon dioxide occur?

• Rib cage

• Alveolus

• Bronchus

• Diaphragm

Which of the following diseases is not related to the respiratory system?

• Asthma

• Lung cancer

• Emphysema

• Anaemia

Diagram 2 shows an insect. The insect respiratory system is through the organ of

• Lungs

• Trachea

• Membrane cell

• Alveolus

What is represented by cotton in Diagram 3?

• Trachea

• Bronchus

• Lungs

• Diaphragm

What is Y?

• Stomata

• Guard cell

• Nucleus

• Mitochondria

The diagram below shows a process of inhalation. Based on the diagram, choose the correct two statements about the process.

• Pressure inside the lung decrease.

• Rib cage moves inward and down.

• Diaphragm flatten.

• Volume of thoracic cavity decrease.

Guard cell contain chloroplast for _______________ process.

Stoma will _________ in the presence of light (photosynthesis process) and __________ when it becomes dark or too much water loss especially on a hot day.

• close , close

• close , open

• open , open

• open, close