Respiratory System Quiz

Which structure is primarily responsible for the exchange of gases in the lungs?

• Bronchi

• Alveoli

• Trachea

• Diaphragm

What is the main function of the nasal cavity?

• Gas exchange

• Air filtration and humidification

• Sound production

• Oxygen transport

The larynx serves which of the following primary functions?

• Gas exchange

• Sound production

• Air passageway

• Both B and C

How do the bronchi and bronchioles contribute to respiratory function?

• They facilitate gas exchange.

• They transport air to and from the lungs.

• They regulate blood pH.

• They produce surfactant.

Which phase of pulmonary ventilation involves the contraction of the diaphragm?

• Expiration

• Inspiration

• Gas exchange

• External respiration

During expiration, the volume of the thoracic cavity:

• Increases

• Decreases

• Remains constant

• Fluctuates randomly

What is the primary driving force for air to flow into the lungs during inspiration?

• Atmospheric pressure

• Surfactant production

• Lung elasticity

• Partial pressure of oxygen

Which of the following describes passive expiration?

• It requires muscle contraction.

• It occurs during physical exertion.

• It relies on elastic recoil of lung tissues.

• It involves the contraction of the diaphragm.

Which muscle is primarily responsible for increasing the volume of the thoracic cavity during inspiration?

• External intercostals

• Abdominal muscles

• Internal intercostals

• Pectoralis major

The diaphragm is innervated by which nerve?

• Vagus nerve

• Phrenic nerve

• Intercostal nerve

• Spinal nerve