The Human Respiratory System

Which of the following is the correct pathway through which air travels in the human respiratory system?

• Nose, lungs, pharynx, trachea

• Nose, pharynx, trachea, lungs

• Pharynx, nose, trachea, lungs

Which of the following is responsible for preventing food from entering the trachea?

• Epiglottis

• Glottis

• Larynx

Which of the following correctly describes the method of inhalation?

• Rib muscles and diaphragm contract, volume in the chest cavity decreases, air pressure increase.

• Rib muscles and diaphragm contract, volume of the chest cavity increases, air pressure decreases.

• Ribs and the diaphragm relax, volume of chest cavity increases, air pressure decreases.

What is the cavity at the rear of the mouth called?

• Larynx

• Pharynx

• Trachea

Which of the following are parts of the human respiratory system?

• Trachea

• Diaphragm

• The lungs

• All of the above

Approximately how many alveoli are found in the human lungs?

• 10,000

• 300 million

• 500,000

• 10000