The Respiratory System

What is the function of the alveoli in the lungs?

• To exchange oxygen and carbon dioxide between the air and blood.

• To filter out dust and particles from the air.

• To produce mucus that lubricates the lungs.

• To regulate the temperature of the air entering the lungs.

What is the role of cilia in the respiratory system?

• To trap and move particles out of the airways.

• To facilitate gas exchange in the alveoli.

• To produce mucus for lubrication.

• To filter blood in the kidneys.

What are the two main processes of respiration?

• Inhalation and exhalation.

• Photosynthesis and respiration.

• Digestion and absorption.

• Breathing and circulation.

What is the role of the diaphragm in breathing?

• The diaphragm expands to allow air in and contracts to push air out.

• The diaphragm contracts to allow air in and relaxes to push air out.

• The diaphragm has no role in breathing.

• The diaphragm only helps in exhaling air.

What is the respiratory structure also known as the windpipe?

• Bronchus

• Trachea

• Larynx

• Alveoli

Which cavity do we primarily use for breathing?

• Nasal Cavity

• Oral Cavity

• Thoracic Cavity

• Abdominal Cavity

What gas does the Respiratory System absorb?

• Carbon Dioxide

• Nitrogen

• Oxygen

• Hydrogen

What happens to the chest cavity during inhalation?

• It contracts, pushing air out of the lungs.

• It remains the same size, allowing air to flow freely.

• It expands, creating a vacuum that pulls air into the lungs.

• It fills with fluid, preventing air from entering.

In which direction is the diaphragm moving while exhaling?

• Up

• Down

• Sideways

• Inward

What is the pathway of air from the nose to the lungs?

• Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Lungs.

• Nasal cavity → Larynx → Trachea → Bronchi → Alveoli.

• Nasal cavity → Pharynx → Trachea → Lungs → Bronchi.

• Nasal cavity → Pharynx → Bronchi → Larynx → Lungs.