Topic 8

Which of the following structures is part of the upper respiratory system?

• Nose
• Larynx
• Trachea
• Bronchi

What is the primary function of the conducting zone in the respiratory system?

• Filtering, warming, and moistening air
• Gas exchange
• Producing sound
• Pumping blood

During inhalation, what happens to the diaphragm?

• It contracts and moves down
• It relaxes and moves up
• It remains unchanged
• It expands sideways

What is the normal breathing rate for adults?

• 12–20 breaths per minute
• 5–10 breaths per minute
• 25–30 breaths per minute
• 35–40 breaths per minute

Where does external respiration occur?

• Between the alveoli and pulmonary capillaries
• Between the blood and tissue fluid
• Between the trachea and bronchi
• Between the nose and pharynx

What is the main gas exchanged during internal respiration?

• Carbon dioxide
• Nitrogen
• Oxygen
• Hydrogen

Which part of the brain controls the rate of ventilation?

• Medulla oblongata
• Cerebellum
• Hypothalamus
• Cerebrum

What causes air to flow into the lungs during inhalation?

• Negative pressure in the alveoli
• Positive pressure in the alveoli
• Contraction of the alveoli
• Expansion of the bronchi

Which of the following is part of the respiratory zone?

• Alveoli
• Trachea
• Bronchi
• Larynx

During exhalation, what happens to the rib cage?

• It moves down and in
• It moves up and out
• It remains unchanged
• It expands sideways