Thorax Acad Success MCQ's

32 Questions | Total Attempts: 2818

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Thorax Acad Success MCQ

The thorax or chest is a part of the anatomy of humans and various other animals located between the neck and the abdomen. It contains organs including the heart, lungs, and thymus gland, as well as muscles and various other internal structures. Take up the thorax and Acad success MCQ`s below and get to learn more.


Questions and Answers
  • 1. 
    Regarding the skeleton of the thorax                                            
    • A. 

      The floating ribs are ribs 8-12

    • B. 

      A typical rib consists of all of the following : head, a neck, a tubercle, and a shaft with its costal groove

    • C. 

      The most typical rib is rib 1

    • D. 

      The sternaI angIe marks the articulation of rib 3

    • E. 

      A line through the sternal angle bisects the disc between vertebrae T2 and T3

  • 2. 
    Regarding the thoracic waII:
    • A. 

      The subcostal muscles are best developed in the upper part of the thorax

    • B. 

      The innermost intercostals are often regarded as parts of the external intercostal muscles

    • C. 

      The anterior intercostal membrane is the membranous portion of the internal intercostal muscle

    • D. 

      The anterior intercostal arteries are branches of the internal thoracic arteries

    • E. 

      The intercostal nerves are the posterior rami of the 12 thoracic nerves

  • 3. 
    The conducting system of the heart comprises:
    • A. 

      The sinuatrial node, His bundle, right and left branches

    • B. 

      The sinuatrial node, atrioventricular node, His and Her bundle, superior and inferior crura

    • C. 

      The atrioventricular and atrial nodes, His bundle, right and left crura

    • D. 

      The sinuatrial node, atrioventricular node, His bundle, right and left branches, and Purkinje fibers network

    • E. 

      SA and AV node, His and Her bundle, anterior and posterior crura, Purkinje fibers and network

  • 4. 
    Which of the following is NOT considered a group within the axillary lymph node chain?
    • A. 

      Humeral nodes

    • B. 

      Deep cervical nodes

    • C. 

      Apical nodes

    • D. 

      Central nodes

    • E. 

      Pectoral nodes

  • 5. 
    Which of the following does NOT lie in the superior mediastinum?
    • A. 

      Left recurrent laryngeal nerve

    • B. 

      Right recurrent laryngeal nerve

    • C. 

      Superior vena cava

    • D. 

      Trachea

    • E. 

      Esophagus

  • 6. 
    A tumor of the esophagus in the thorax would, if enlarged, most likely affect which part of the heart
    • A. 

      Right atrium

    • B. 

      Left atrium

    • C. 

      Left ventricle

    • D. 

      Right ventricle

    • E. 

      Both ventricles

  • 7. 
    A tumor or growth in the area of the ligamentum arteriosum would most likely involve which of the following structures:
    • A. 

      Right phrenic nerve

    • B. 

      Left phrenic nerve

    • C. 

      Left recurrent laryngeal nerve

    • D. 

      Right recurrent laryngeaI nerve

    • E. 

      Right vagus nerve

  • 8. 
    A sharp knife wound starting at and including the external intercostal muscle would penetrate how many layers before hitting the lung tissue itself (include only tissue layers):
    • A. 

      Four

    • B. 

      Five

    • C. 

      Six

    • D. 

      Seven

    • E. 

      Eight

  • 9. 
    The groove for the subclavian vein and artery are associated with
    • A. 

      First rib

    • B. 

      Second rib

    • C. 

      Third rib

    • D. 

      Eight rib

    • E. 

      Clavicle

  • 10. 
    Which one of the following is not associated with right atrium (or auricle):
    • A. 

      Fossa ovalis

    • B. 

      Atrioventricular node

    • C. 

      Opening of coronary Sinus

    • D. 

      Musculi pectinati

    • E. 

      Trabeculae carnae

  • 11. 
    A knife wound into the heart, at the level of the fifth left intercostal space, near the sternum, would penetrate all of the following layers except:
    • A. 

      Fibrous pericardium

    • B. 

      Serous visceral pericardium

    • C. 

      Serous parietal pericardium

    • D. 

      Visceral and parietal pleura

    • E. 

      Pericardial cavity

  • 12. 
    Which one of the following statements is not true of the thoracic duct:
    • A. 

      Extends from upper abdomen to neck

    • B. 

      Found in the posterior mediastinum

    • C. 

      Associated with the cisterna chili

    • D. 

      Drains both right and left sides of the thorax

    • E. 

      Usually ascends to the right of the thoracic aorta

  • 13. 
    The septamarginaItrabecula (moderator band) is associated with the:
    • A. 

      Right atrium

    • B. 

      Right ventricle

    • C. 

      Left atrium

    • D. 

      Left ventricle

    • E. 

      Base of heart

  • 14. 
    The posterior intercostaIarteries are branches of
    • A. 

      The internal thoracic artery

    • B. 

      The subclavian artery

    • C. 

      The aorta

    • D. 

      The highest intercostal artery

    • E. 

      The thoraco-acromial artery

  • 15. 
    Which of the following is not true for the greater splanchnic nerve:
    • A. 

      Consists of preganglionic sympathetic fibers

    • B. 

      The fibers can be found in the posterior mediastinum

    • C. 

      Branches arise from the 9th to the 10th sympathetic ganglion region

    • D. 

      Fibers come from the spinal cord via white rami without synapse

    • E. 

      Fibers terminate in the celiac (prevertebral) ganglion

  • 16. 
    Select the correct statement
    • A. 

      The breast directly overlies the pectoralis major and serratus anterior muscles

    • B. 

      The superolateral quadrant of the breast is a frequent site of mammary tumors

    • C. 

      The mammary gland is extremely vascular and supplied mainly by the superior thoracic artery

    • D. 

      The venous drainage of the breast indicate the nervous pathways

    • E. 

      The lymphatic vessels of the areola and nipple drain lymph primarily toward the rectus sheath

  • 17. 
    An esophageal aneurysm (marked dilation) would most likely affect which part of the heart directly
    • A. 

      Left ventricle

    • B. 

      Right ventricle

    • C. 

      Left atrium

    • D. 

      Right atrium

    • E. 

      Left auricle

  • 18. 
    The mitral (bicuspid) valve is best heard:
    • A. 

      Over the left second intercostal space

    • B. 

      Over the right second intercostal space

    • C. 

      Over the lower part of the sternal body

    • D. 

      Over the mid-portion of the sternum

    • E. 

      Over the fifth left Intercostal space at the mid-clavicular line

  • 19. 
    A bullet shot into the lateral chest wall through an intercostal space would perforate immediately which of the following after passing through the parietal pleura:
    • A. 

      Innermost intercostal muscle

    • B. 

      Potential pleural cavity

    • C. 

      Internal Intercostal muscle

    • D. 

      Endothoracic fascia

    • E. 

      Pericardial cavity

  • 20. 
    Which one of the following is not associated with the posterior mediastinum
    • A. 

      Vagus nerve

    • B. 

      Esophagus

    • C. 

      Thoracic duct

    • D. 

      Azygos vein

    • E. 

      Phrenic nerve

  • 21. 
    A 60-year-old construction worker was admitted to the hospital with severe shortness of breath (dyspnea) and great difficulty in swallowing (dysphagia). The patient states he has suffered increased difficulty and pain in swallowing for over six month, has subsisted on a liquid diet and lost thirty pounds. His sputum is bloodtinged and for the last few weeks he has become hoarse. X-ray examination of chest reveals a widening of the mediastinum and fluoroscopy shows obstruction of esophagus at level of tracheal bifurcation, Diagnosis: cancer of esophagus with obstruction and metastatic Involvement of surrounding posterior mediastinal structures. The hoarseness was due to involvement of
    • A. 

      Right vagus nerve

    • B. 

      Right recurrent laryngeal nerve

    • C. 

      Left recurrent laryngeaI nerve

    • D. 

      Left phrenic nerve

    • E. 

      Greater splanchnic nerve

  • 22. 
    An aneurysm (ballooning) of the arch of the aorta would most likely affect all except one of the following:
    • A. 

      Left primary bronchus

    • B. 

      Esophagus

    • C. 

      Left recurrent laryngeal nerve

    • D. 

      Right recurrent laryngeal nerve

    • E. 

      Phrenic nerve

  • 23. 
    The anterior intercostal arteries are branches of the:
    • A. 

      Posterior intercostal arteries

    • B. 

      Internal thoracic arteries

    • C. 

      MediastinaI arteries

    • D. 

      Highest intercostaI arteries

    • E. 

      Subcostal arteries

  • 24. 
    Which of the following statements is incorrect:
    • A. 

      The base of the heart if formed by the ventricles

    • B. 

      The sternocostal surface of the heart is formed mainly by the right ventricle

    • C. 

      The inner surfaces of both auricles of the heart are ridged by the musculi pectinate

    • D. 

      The septomarginal trabecula (moderate band) contains Purkinje flbers from the right limb of the atrioventricular bundle

    • E. 

      The cardiac skeleton surrounds the atrioventricular and semilunar openings giving attachment to the valves

  • 25. 
    Examination of a heart reveals an old and a new area of damage (infarction) caused by occlusion of the Circumflex branch of the left coronary artery. The damage is in the:
    • A. 

      Right atrium and right ventricle

    • B. 

      Left atrium and left ventricle

    • C. 

      Left auricle and interventricular septum

    • D. 

      Apex of the heart

    • E. 

      Pulmonary artery