Respiratory System Quiz

Which structure filters, moistens, and warms air in the human gas exchange system?

• Pharynx

• Larynx

• Nose

• Trachea

What is the main function of alveoli in the respiratory system?

• Passage for food and air

• Gas exchange between the circulatory system and lungs

• Voice production

• Covering the trachea during swallowing

Which structure in the respiratory system is responsible for covering the trachea during swallowing?

• Larynx

• Epiglottis

• Bronchi

• Alveoli

What happens to the diaphragm during inhalation?

• It rises

• It contracts and moves down

• It relaxes

• It remains stationary

Which molecule is the main buffer in the blood?

• Hemoglobin

• CO2

• HCO3- (Bicarbonate)

• O2

What is the primary function of goblet cells in the respiratory system?

• Produce new cells

• Sweep debris trapped by mucus

• Secrete mucus

• Aid in breathing

Which part of the brain is the respiratory control center?

• Cerebellum

• Medulla oblongata

• Hypothalamus

• Cerebrum

What is the effect of a left shift in the oxygen dissociation curve?

• Oxygen is released more easily

• Oxygen is held more tightly by hemoglobin

• Increased CO2 levels

• Decreased pH levels

Which structure in the respiratory system is known as the voice box?

• Pharynx

• Larynx

• Trachea

• Bronchi

What is the role of surfactant in the alveoli?

• Increase surface tension

• Reduce surface tension

• Facilitate mucus production

• Aid in swallowing