Respiratory System Quiz

What is the first step in the process of ventilation?

• Air travels through the bronchial tubes

• Inhalation begins

• Exchange of gases

• Air enters the respiratory system

Which muscle contracts and moves downward during inhalation?

• Intercostal muscles

• Abdominal muscles

• Diaphragm

• Pectoral muscles

Where does air rush into our respiratory system through?

• Bronchial tubes

• Nose

• Mouth

• Alveoli

What is the name of the tiny air sacs at the end of the bronchioles in the lungs?

• Alveoli

• Capillaries

• Bronchi

• Trachea

What happens as the air reaches the alveoli?

• Digestion begins

• Carbon dioxide diffuses into the alveoli

• None of the above

• Oxygen diffuses into the alveoli

What causes the chest cavity to become smaller during exhalation?

• Contraction of diaphragm

• Relaxation of intercostal muscles

• Relaxation of diaphragm

• Contraction of intercostal muscles

What is the function of alveoli in the respiratory system?

• To increase the space in the chest cavity

• To exchange gases between blood and air

• To produce mucus for breathing

• To warm the air entering the respiratory system

What is the purpose of the thin walls of the alveoli?

• To increase the surface area for gas exchange

• To store excess oxygen

• To filter the air entering the lungs

• To prevent the exchange of gases

What happens to the chest cavity during inhalation?

• It collapses

• It remains the same

• It expands

• It becomes smaller

Where does the exchange of gases take place in the respiratory system?

• Bronchial tubes

• Bronchi

• Alveoli

• Trachea