Respiratory System Quiz

Which of the following is NOT an organ of the respiratory system?

• Lungs

• Heart

• Trachea

• Bronchi

What is the primary function of the alveoli in the lungs?

• To transport oxygen to the heart

• To warm the air before it enters the lungs

• To facilitate the exchange of oxygen and carbon dioxide

• To produce mucus to trap dust and pathogens

Which part of the respiratory system is commonly known as the windpipe?

• Larynx

• Trachea

• Bronchus

• Pharynx

During inhalation, what happens to the diaphragm?

• It relaxes and moves upwards

• It contracts and moves downwards

• It contracts and moves upwards

• It relaxes and moves downwards

What gas is expelled from the body during exhalation?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Hydrogen

Which structure directly follows the trachea in the pathway of air entering the body?

• Larynx

• Bronchi

• Alveoli

• Pharynx

What is the role of the cilia in the respiratory system?

• To exchange gases in the alveoli

• To produce mucus

• To warm the air before it reaches the lungs

• To trap and move particles out of the airways

How does oxygen enter the blood from the alveoli?

• Through active transport

• Through diffusion

• Through osmosis

• Through filtration

What is the primary muscle involved in the process of breathing?

• The heart

• The diaphragm

• The intercostal muscles

• The abdominal muscles

Which of the following statements is true about the gas exchange process in the lungs?

• Oxygen is transported to the lungs through the bloodstream.

• Carbon dioxide moves from the blood to the alveoli because of a higher concentration in the alveoli.

• Oxygen moves from the alveoli to the blood because of a higher concentration in the alveoli.

• Carbon dioxide is absorbed by the alveoli to be used in cellular respiration.