Top 150+ Solved Thorax MCQ Questions Answer
Q. The trachea
a. Drains to axillary lymph nodes
b. Is supplied by glossopharyngeal nerve
c. Is marked at its lower end by the sternal angle
d. Enters the thoracic inlet slightly to the left
e. Commences below the cricoid at the level of C5
Q. The most superficial structure in the thoracic inlet is the
a. Vagus nerve
b. Superior vena cava
c. Right subclavian artery
d. Left subclavian artery
e. Thoracic duct
Q. The diaphragm
a. Has the oesophageal opening opposite the T8 vertebrae
b. Is supplied by C4, 5, 6
c. Has a major role in expiration
d. Has a vena caval opening at T10
e. Has an aortic opening opposite T12
Q. Which passes through the diaphragm with the oesophagus?
a. Azygos vein
b. Right vagus
c. Sympathetic trunks
d. Thoracic duct
e. Phrenic nerves
Q. With regard to the coronary arteries
a. Right arises from the posterior coronary sinus
b. Left supplies the conducting system in most patients
c. Right supplies the posterior descending branch in most patients
d. There are no arteriolar anastomoses between left and right
e. Phrenic nerves
Q. Regarding bronchopulmonary segments, which is FALSE?
a. There are approximately 10 segments in each lung
b. The lingual is divided into upper and lower segments
Q. Which muscle is NOT used in forced expiration?
a. Transverses abdominis
b. Rectus abdominis
c. Diaphragm
d. External oblique
e. Internal oblique
Q. Which vessel passes directly behind the right hilum?
a. Right phrenic nerve
b. Right vagus nerve
c. Azygos vein
d. Internal mammary artery
e. Hemi-azygos vein
Q. In the superior mediastinum
a. The apex of the left lung abuts the trachea
b. The left vagus is in contact with the trachea
c. The right phrenic descends in contact with SVC
d. The azygos vein hooks under the right main bronchus
e. SVC runs posterior to the right main bronchus
Q. Regarding the diaphragm
a. Its fibres arise in continuity with those of the internal oblique muscle
b. It has a central tendon which is fused inseparably to the visceral pericardium
c. Its right crus is fixed to the upper two lumbar vertebrae
d. 95% of its muscle fibres are of the slow twitch fatigue resistant variety
e. its proprioceptive fibres come from the lower intercostal nerves
Q. The major arterial supply to the interventricular septum originates from the
a. Circumflex artery
b. Marginal artery
c. Posterior descending
d. Anterior descending
e. Conus artery
Q. The vagus nerve
a. Arises in a series of rootlets from the pons
b. Lies outside the carotid sheath in the neck
c. Supplies muscles of the larynx via the recurrent laryngeal nerve
d. Passes in front of the root of the lung
e. Has a superior and inferior ganglion within the jugular fossa
Q. Regarding the surface markings of the lung and pleura
a. The border of the lung lies two ribs below the pleural reflection
b. The hilum of the lungs lie at the level of T10 verterbra
c. The oblique fissure follows the line of T10 vertebra
d. The oblique fissure follows the line of the 5th rib
e. The horizontal fissure meets the oblique fissure in the left midaxillary line
Q. Thoracic skeleton:
a. the function of the ribs is primarily to protect the thoracic contents
b. each rib articulates with its own thoracic vertebra and the one above
c. the tubercle of a typical rib has two facets, the lateral facet being non-articular
d. the 2nd to 7th sternocostal joints are synovial type, each with a single cavity
e. the body of the sternum usually fuses with the manubrium with advancing age