Question Banks

Deficiency in which of the following usually predisposes to thrombosis  rather than bleeding?

A newborn infant has multiple, hemorrhagic, cutaneous lesions and does  not respond to sound. Head CT scan shows periventricular calcifications.  Which of the following infectious agents is the most likely cause of this   child's presentation?

A strict vegetarian is not getting sufficient vitamin D in his diet, and he develops osteomalacia. This disease is characterized by which of the following changes in his bones?

A three-year-old child is brought to the emergency room after inhaling  a peanut. The peanut has lodged in the right mainstem bronchus, largely  occluding it. The child is cyanotic, and non-invasive transcutaneous  monitoring reveals a PO2 of 60 mm Hg. Which of the following mechanisms   best accounts for the child's hypoxemia?

A couple brings in their 6-month-old child because they are concerned about the child's inability to sit without support. The physician interviews  the parents and ascertains that they are both Ashkenazic Jews. The doctor   should inform them that, because of their heritage, their child may have   an increased risk of which of the following disorders?

Which of the following is specifically associated with infection with  Schistosoma haematobium?

A football player is examined by the team doctor following a shoulder  injury during a game. Preliminary x-rays show an inferior dislocation of   the humerus. On further examination, there is weakness in lateral rotation    and abduction of the arm. The nerve most likely affected is the

A 45-year-old homeless man has a chronic cough, a cavitary lesion of  the lung, and is sputum positive for acid-fast bacilli. Which of the  following is the principle form of defense by which the patient's body   fights this infection?

A researcher is examining the distribution of an ion channel protein  in the kidney. She incubates slices of kidney tissue in a dilute solution   of a specific antibody directed against the protein, then uses the    immunoperoxidase method to localize the ion channel proteins. She     notes the presence of brown pigment in a population of epithelial      cells, which on closer examination, have a brush border. The      researcher concludes that the protein is probably present in      cells of the

A mutation affecting the development of the diencephalon could  interfere with the secretion of which of the following hormones?