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A healthy, 37-year-old, recently divorced woman loses her job at the auto factory. She picks up her three young children from the factory day care center and gets into an automobile accident on the way home. Her 5-year-old son, who was not wearing a seat belt, sustains a severe head injury. The woman was not hurt in the accident, but is hyperventilating as she sits in the waiting room at the hospital. She complains of feeling faint and has blurred vision. Which of the following is decreased in this woman?

A child is brought to the pediatrician because of perianal itching, which has been disturbing the child's sleep. Physical examination reveals scaly skin in the perianal region. The physician instructs the parents to place transparent tape on the perianal region the next morning, and then retur n to the office. In the office, the tape is transferred to a microscope slide, and low-power examination of the tape reveals oval eggs that are flattened along one side. The microorganism most likely responsible for the child's symptoms is

A 60-year-old male with angina comes to the emergency room with severe chest pain unresponsive to sublingual nitroglycerin. An EKG shows ST segment elevation in the anterolateral leads, and thrombolytic therapy is initiated. If streptokinase is given to this patient, it may produce thrombolysis after binding to which of the following proteins?

To which of the following diseases is pyruvate kinase deficiency most similar clinically?

A 38-year-old AIDS patient presents to his physician's office in Kansas City, Missouri, complaining of fever for the past week and an increasing headache. He also states that sunlight hurts his eyes and that he has been feeling nauseated and weak. His past medical history is significant for Pneumocystis pneumonia and a total CD4 count of 89. Current medications are trimethoprim/sulfa and indinavir. Cerebrospinal fluid (CSF) reveals 4 WBC, and budding encapsulated yeast forms grow on Sabouraud's agar. Which of the following is an accurate description of the morphology of the infectiou s form of the organism responsible for the man's illness?

Which of the following occurs at the darkly stained band indicated by the arrow?

A healthy 42-year-old woman with a history of anxiety attacks sits in the hospital waiting room as her 3-year-old daughter undergoes open heart surgery for a septal malformation. The woman experiences a feeling of suffocation and is obviously hyperventilating. She informs her husband that she feels faint and has blurred vision. Which of the following is most likely to relieve the symptoms caused by hyperventilation?

A patient, who appears to be female, is found to be 46,XY. The patient's vagina is very shallow, ending in a blind pouch, and there are palpable masses in the labia. The diagnosis of testicular feminization syndrome is made. Which of the following was most likely present during the early fetal life of this individual?

Which of the following would be expected to be decreased in a patient with chronic hypertension secondary to renal artery stenosis?

A surgeon performs an exploratory laparotomy, producing a large incision in the patient's abdomen. Poor blood supply to which of the following is most likely to cause problems during the healing process?