Human Respiratory System Quiz

What is the primary function of the human respiratory system?

• To circulate blood

• To produce ATP

• To exchange gases

• To digest food

Which structure is often called the voice box?

• Esophagus

• Larynx

• Pharynx

• Trachea

What is the role of the epiglottis?

• To keep food from going down the trachea

• To produce mucus

• To filter air

• To support the trachea

How many lobes does the right lung have?

• One

• Two

• Three

• Four

What is the function of alveoli?

• To produce surfactant

• To exchange gases

• To filter air

• To support the trachea

Which muscle is a major muscle involved in respiration located under the lungs?

• Intercostal muscles

• Cardiac muscle

• Diaphragm

• Abdominal wall muscles

What happens to blood pH when carbon dioxide concentration increases?

• It becomes more basic

• It becomes more acidic

• It becomes neutral

• It remains the same

What is the normal blood pH level?

• 6.4

• 7.0

• 7.4

• 8.0

Which cells produce surfactant in the alveoli?

• Type 1 alveolar cells

• Type 2 alveolar cells

• Red blood cells

• White blood cells

What is the primary role of surfactant in the alveoli?

• To produce mucus

• To filter air

• To decrease surface tension

• To increase surface tension