Test

A 55-year-old male with hypertension and a past medical history of  myocardial infarction is prescribed atenolol. This medication will  lower his blood pressure by

A 20-year-old woman presents to the emergency room in labor. She has  had no prenatal care. The patient is noted to be very restless, with fever,   profuse sweating, marked tachycardia, and a marked tremor. Over the next    hour, she develops delirium, nausea, vomiting and abdominal pain     between contractions. This potentially fatal condition is     most likely related to which of the following thyroid diseases?

A patient with familial hypercholesterolemia undergoes a detailed serum  lipid and lipoprotein analysis. Studies demonstrate elevated cholesterol  in the form of increased LDL without elevation of other lipids.   This patient's hyperlipidemia is best classified as which of the    following types?

A research physiologist is performing an experiment in which he stimulates sympathetic cholinergic neurons. Which of the following  responses is expected?

A 30-year-old man is found to have a mass in his left anterior neck. Chest x-ray films are normal. A CT scan of the thorax and abdomen shows a  hemorrhagic right adrenal mass. Serum electrolytes are remarkable for  decreased calcium levels. Which of the following neoplasms is most likely   responsible for the depression of calcium levels in this patient?

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?