1. MCQ of THORAX for practice……………..
Dr. Ashfaq.
1. The right lung- 6. Relation of base of left lung are-
a Is larger than the left a fundus of the stomach
b Is divided by fissures into the upper and lower b right lobe of the liver
lobes and the lingula
c Possesses 10 BPSs c spleen
d Is less prone to infection d left kidney
e Is related inferiorly to the liver e left suprarenal gland
2. Intercostal nerves- 7. Intercellular junctions within intercalated discs
are-
a are ventral ramus of thoracic spinal nerve a zonula occludentes
b are 12 pairs in number b fascia adherentes
c are purely motor nerves c macula adherentes
d lie below intercostal vessels d gap junctions
e carry GVE fibers e tight junctions
3. The thymus- 8. Aortic opening of the diaphragm transmits-
a develops from 2nd pharyngeal pouch a arch of the aorta
b contains Hassal’s corpuscle b right phrenic nerve
c is a central lymphoid organ c azygos vein
d produces B lymphocyte d vagus nerve
e secretes some hormone e thoracic duct
4. Branches of arch of the aorta are- 9. Respiratory unit includes-
a coronary arteries a segmental bronchus
b brachiocephalic trunk b respiratory bronchiole
c left subclavian artery c terminal bronchiole
d right common carotid artery d alveolar sacs
e pulmonary trunk e alveoli
5. Sternum- 10. Fibrous pericardium-
a is a flat bone a is also called epicardium
b is a membranous bone b is intimately blended with central tendon of
the diaphragm
c forms anterior boundary of the mediastinum c develops from splanchnopleuric layer of
d contains red marrow throughout life lateral plate mesoderm
e is formed by fusion of 5 sternebrae d is supplied by autonomic nerves
e is pain sensitive

2. 11. The thoracic trachea- 16. Nonkeratinized stratified squamous epithelium
is found in-
a Bifurcates at the level of the sternal angle a tongue
b Is closely related to the esophagus b esophagus
c Has complete fibrocartilaginous rings within c thoracic duct
its walls d skin
d Is related anteriorly to the thyroid gland e stomach
e Ends at the level of the sternal angle
12. Contents of the middle mediastinum are- 17. Gaseous exchange occurs in-
a thymus a trachea
b trachea b primary bronchus
c heart c lobar bronchus
d thoracic duct d alveolar sacs
e ascending aorta e alveoli
13. A typical thoracic vertebra has- 18. Parts of the parietal pleura are-
a heart shaped body a costal pleura
b demifacet on body b mediastinal pleura
c foramen transversarium c visceral pleura
d mammilary process d pulmonary pleura
e short, slender transverse process e diaphragmatic pleura
14. Fate of the fertilization include- 19. Branches of the internal thoracic artery are-
a determination of chromosomal sex a superior phrenic artery
b restoration of haploid number of chromosome b superior epigastric artery
c initiation of cleavage c posterior intercostal artery
d formation of blastocyst d musculophrenic artery
e formation of morula e pericardiophrenic artery
14. Coronary arteries are- 19. Azygos vein-
a the very first branches of arterial system a receives blood from bronchial veins
b vasa vasorum b is paired
c elastic arteries c join superior & inferior vena cava
d connected to each other by actual anastomosis d enters thoracic cavity through aortic opening
e functional end arteries e drains into inferior vena cava
1. The adult heart- 6. The right ventricle-
a Is related posteriorly to the esophagus, left a Forms most of the inferior surface of the
main bronchus and aorta heart
b Lies on the left dome of the diaphragm b Is normally oval in cross section
c In health weighs approximately 900 gm c Has a tricuspid valve in its inflow part
d Admits the great veins on its posterior surface d Usually contains three conical papillary
e Is totally enclosed by the serous pericardium muscles
e Possesses a pulmonary orifice guarded by a
tricuspid valve

3. 2. The mitral valve- 7. The ascending aorta-
a Possesses two cusps a Ascends as far as the right sternoclavicular
b Guards the right atrioventricular orifice joint
b Lies intrapericardially
c Is closely related to the aortic valve c Has no branches
d Has no papillary muscle attachments d Is related posteriorly to the right main
e Lies on the posterior wall of the left ventricle bronchus
e Is related anteriorly to the sternum
3. The thoracic duct- 8. The lung tissue-
a Arises in the thorax a Receives its oxygenated arterial supply via
b Ascends anterior to the vertebral column branches of the thoracic aorta
b Has venous drainage into the azygos system
of veins
c Drains into the left brachicephaliv vein c Has no lymph drainage
d Drains mainly thoracic structures d Has ciliated columnar epithelial lining
e Is joined by the right lymphatic duct throughout
e Receives a nerve supply from the vagus
5. The thoracic esophagus- 10. The pulmonary trunk-
a Lies posterior to the trachea a Lies at its origin to the root of the aorta
b Is directly related to the vertebral column b Is connected to within a common sleeve of
throughout its course serous pericardium with the ascending aorta
c Is related to the left atrium c Bifurcates anterior to the aortic arch
d Pierces the central tendon of the diaphragm at d Is related to the left pleura and lung
the level of the 8th thoracic vertebra e Is closely related to both right and left
e Is crossed by the left bronchus coronary arteries
3. First thoracic vertebra/’s- 8. Primary cartilaginous joints are-
a is typical a sternoclavicular
b presents two demifacets on body b costovertebral
c vertebral foramen is small c first sternocostal
d superior vertebral notch is prominent d xiphisternal
e spinous process is directed horizontally e costochondral
4. Muscle(s) of inspiration include(s)- 9. Azygos vein-
a External intercostal a ends into inferior vena cava
b Pectoralis major b is a part of portal circulation
c The diaphragm c has no valve
d Serratus anterior d connects superior & inferior vena cava
e Internal intercostal of same side e passes through vena caval opening of
diaphragm