Respiratory System Quiz

What vital substance does the respiratory system supply to the body?

• Carbon dioxide

• Water

• Oxygen

• Nutrients

What is the main organ of the respiratory system?

• Heart

• Brain

• Lungs

• Liver

What is the primary function of the lungs in the respiratory system?

• To pump blood throughout the body

• To take in oxygen and get rid of carbon dioxide

• To filter waste from the blood

• To absorb nutrients

Why can't cells produce energy without oxygen?

• Because they need water to produce energy

• Because they need sunlight to produce energy

• Because they need oxygen to produce energy

• Because they need carbon dioxide to produce energy

What is the function of the nasal cavity in the respiratory system?

• It exchanges gases between the alveoli and blood vessels.

• It warms and moistens the air as it enters the nose.

• It prevents food from entering the trachea.

• It connects the nose and mouth passageways.

What structure is known as the voice box?

• Trachea

• Pharynx

• Larynx

• Bronchi

Where does the air go after it leaves the larynx?

• Into the bronchi

• Into the nasal cavity

• Through the trachea

• Directly into the lungs

What are the smaller tubes that branch from the trachea and lead to the lungs called?

• Alveoli

• Larynx

• Pharynx

• Bronchi

What are the tiny air sacs in the lungs where gas exchange takes place called?

• Trachea

• Bronchi

• Alveoli

• Larynx

What occurs between the alveoli and the blood vessels surrounding them?

• Warming and moistening of air

• Prevention of food entering the trachea

• Connection of nose and mouth passageways

• Gas exchange