Human Respiratory System Quiz

What is the primary function of the respiratory system?

• To circulate blood
• To exchange gases
• To digest food
• To regulate body temperature

Which of the following structures is NOT part of the human respiratory system?

• Trachea
• Bronchi
• Esophagus
• Alveoli

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

• Filters air
• Produces sound
• Transports oxygen
• Regulates breathing rate

During aerobic respiration, what gas is produced as a waste product?

• Oxygen
• Nitrogen
• Carbon dioxide
• Hydrogen

What is the main purpose of the alveoli in the lungs?

• To warm the air
• To filter dust
• To facilitate gas exchange
• To produce mucus

How does oxygen move from the air into the blood?

• Active transport
• Diffusion
• Osmosis
• Filtration

What keeps the trachea open?

• Muscle contractions
• Rings of cartilage
• Mucus
• Air pressure

Which part of the respiratory system is responsible for filtering and moistening the air?

• Lungs
• Nasal cavity
• Bronchi
• Alveoli

What happens to carbon dioxide in the alveoli?

• It is absorbed into the blood
• It is exhaled
• It is converted to oxygen
• It is stored in the lungs

Which gas is primarily transported by hemoglobin in red blood cells?

• Carbon dioxide
• Oxygen
• Nitrogen
• Hydrogen