Health Sector The Lungs and Gas Exchange Quiz

What is the primary function of the human respiratory system?

• To circulate blood

• To produce hormones

• To exchange gases

• To digest food

What is the process of breathing in and out called?

• Respiration

• Ventilation

• Osmosis

• Diffusion

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

• Capillaries

• Bronchi

• Trachea

• Alveoli

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

• To transport oxygen

• To contract and increase space for the lungs to inflate

• To produce mucus

• To filter air

How many alveoli are there approximately in the human lungs?

• 700 million

• 1 billion

• 100 million

• 200 million

What is the main component of air needed for respiration?

• Hydrogen

• Nitrogen

• Carbon dioxide

• Oxygen

What is the total surface area of the alveoli in the human lungs?

• 50 square meters

• 30 square meters

• 70 square meters

• 10 square meters

What is the function of the bronchioles?

• To pass air to the bronchi

• To pass air to the alveoli

• To transport blood

• To produce mucus

What is the main purpose of the capillaries surrounding the alveoli?

• To produce hormones

• To transport nutrients

• To facilitate gas exchange

• To store oxygen

How many cells make up the thickness of the wall of the alveoli?

• 1 cell

• 2 cells

• 3 cells

• 4 cells