What is the primary function of the respiratory system?

• Digesting food

• Providing extensive surface area for gas exchange

• Regulating body temperature

• Producing hormones

Which part of the respiratory system is responsible for sound production?

• Larynx

• Trachea

• Alveoli

• Bronchi

What structure divides the nasal cavity into two parts?

• Diaphragm

• Pharynx

• Larynx

• Nasal septum

Which type of cells in the alveoli facilitate gas exchange?

• Ciliated cells

• Goblet cells

• Type II pneumocytes

• Type I pneumocytes

What is the average respiratory rate for a healthy adult?

• 30-40 breaths/min

• 20-30 breaths/min

• 12-20 breaths/min

• 5-10 breaths/min

Which part of the respiratory system is lined with ciliated columnar epithelium?

• Bronchi

• All of the above

• Lungs

• Nasal cavity

What is the role of the diaphragm during inspiration?

• It relaxes and moves upward

• It remains stationary

• It contracts and moves downward

• It expands the thoracic cavity

What is the primary function of the pleura?

• Filtering air

• Sound production

• Protection and lubrication of the lungs

• Gas exchange

Which gas is primarily exchanged in the alveoli?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon monoxide

What is the total lung capacity (TLC)?

• The total volume of air that the lungs can hold

• The maximum volume of air that can be moved into and out of the lungs

• The volume of air exchanged during normal breathing

• The volume of air remaining in the lungs after exhalation