Respiratory System Quiz

What is the primary function of the respiratory system?

• To digest food

• To produce hormones

• To exchange gases in the body

• To circulate blood

Which part of the respiratory system is known as the voice box?

• Larynx

• Pharynx

• Bronchi

• Trachea

What is the role of cilia in the nasal cavity?

• To transport nutrients

• To absorb oxygen

• To filter dust and particles

• To produce sound

How does the diaphragm contribute to inhalation?

• It relaxes and moves upward

• It contracts and moves downward

• It relaxes and moves downward

• It contracts and moves upward

What happens to the chest cavity during exhalation?

• It becomes smaller

• It remains the same

• It becomes larger

• It expands

What percentage of oxygen is in the air we inhale?

• 78%

• 21%

• 4%

• 17%

Where does the exchange of oxygen and carbon dioxide occur?

• In the bronchi

• In the trachea

• In the pharynx

• In the alveoli

Why is it possible to perform mouth-to-mouth resuscitation?

• Because exhaled air contains 21% oxygen

• Because exhaled air contains 17% oxygen

• Because exhaled air contains 4% carbon dioxide

• Because exhaled air contains 78% nitrogen

Which habit is NOT recommended for maintaining respiratory health?

• Eating fruits and vegetables

• Smoking regularly

• Exercising regularly

• Avoiding polluted air

What should you do if you notice signs of a respiratory ailment?

• Ignore it

• Consult a doctor

• Avoid exercise

• Start smoking