Pulmonary Surfactant

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Questions and Answers

Which layer of the embryo forms the neural tube and continues development within the mesoderm?

  • Somites
  • Endoderm
  • Ectoderm
  • Mesoderm (correct)

Which layer of the embryo gives rise to the cardiovascular system?

  • Mesoderm (correct)
  • Somites
  • Ectoderm
  • Endoderm

Which structure divides the superior and inferior mediastinum?

  • Bronchi
  • Trachea
  • Pleura
  • Pericardium (correct)

Which system originates from the ventral wall of the primitive foregut endoderm?

<p>Respiratory system (B)</p> Signup and view all the answers

Which structure forms the future lobes of the lungs?

<p>Bronchial buds (D)</p> Signup and view all the answers

Which structures form the bony framework of the thoracic wall?

<p>12 ribs and 12 thoracic vertebrae (C)</p> Signup and view all the answers

Which muscles function in respiration by moving the ribs, thereby changing the volume of the thoracic cavity?

<p>External intercostal, internal intercostal, innermost intercostal, subcostal, and transversus thoracic muscle (C)</p> Signup and view all the answers

Which ribs articulate with the sternum anteriorly?

<p>First seven true ribs (A)</p> Signup and view all the answers

Which muscles have attachments to and are superficial to or act as extensions of the thorax?

<p>Some muscles (D)</p> Signup and view all the answers

What is the function of the thoracic wall?

<p>Movement, respiration, and protection of the thoracic cavity (B)</p> Signup and view all the answers

Which structures compose the posterior thoracic wall?

<p>Thoracic vertebral bodies and intervertebral discs (C)</p> Signup and view all the answers

Which nerves are responsible for the sympathetic innervation of the thoracic wall?

<p>Thoracic sympathetic ganglia (C)</p> Signup and view all the answers

Where does the vagus nerve exit the thoracic cavity?

<p>Through the esophageal hiatus of the diaphragm (B)</p> Signup and view all the answers

Which nerve is particularly at risk during thyroid surgery?

<p>Left recurrent laryngeal nerve (C)</p> Signup and view all the answers

What is the function of the phrenic nerves?

<p>Provide motor innervation to the diaphragm (A)</p> Signup and view all the answers

Which muscles change the volume of the thoracic cavity for respiration to occur?

<p>External intercostal, internal intercostal, innermost intercostal (B)</p> Signup and view all the answers

Which muscle forms the inferior border of the thoracic cavity separating the abdomen from the thorax?

<p>Diaphragm (D)</p> Signup and view all the answers

Which artery supplies the blood to the thoracic wall predominantly from the anterior side?

<p>Internal mammary artery (A)</p> Signup and view all the answers

Which artery supplies the blood to the lateral thoracic wall?

<p>Axillary artery (B)</p> Signup and view all the answers

Which artery supplies the blood to the posterior thoracic wall?

<p>Dorsal scapular artery (D)</p> Signup and view all the answers

Which artery supplies the blood to the head, upper limb, and thoracic wall?

<p>Brachiocephalic trunk (C)</p> Signup and view all the answers

Which vein drains blood from the abdomen and lower limbs into the right atrium?

<p>Inferior vena cava (C)</p> Signup and view all the answers

Which duct drains the lymphatic system of the whole body, apart from the right upper limb and right side of the head?

<p>Cisterna chyli (A)</p> Signup and view all the answers

Which muscles extend inferiorly in the thoracic cavity?

<p>Quadratus lumborum, psoas major/minor, external oblique, internal oblique, transversus abdominis, and rectus abdominis muscles (D)</p> Signup and view all the answers

Which structures are likely to be compressed by a mass in the superior mediastinum near the right brachiocephalic vein?

<p>Right brachiocephalic vein and right lymphatic duct (B)</p> Signup and view all the answers

What can multiple rib fractures resulting in a flail chest alter?

<p>Normal physiology of the thoracic wall (C)</p> Signup and view all the answers

What can displacement of the rib internally cause?

<p>Bleeding within the pleural cavity or lung (A)</p> Signup and view all the answers

What condition occurs when air accumulates in the pleural cavity and shifts mediastinal structures away from the tension pneumothorax?

<p>Tension pneumothorax (C)</p> Signup and view all the answers

What can pericardial effusion ultimately limit within the middle mediastinum?

<p>Space available for the heart within the middle mediastinum (A)</p> Signup and view all the answers

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