A collection of Question Banks in a variety of subjects and topics.
Evaluation of an infant with a variety of congenital abnormalities reveals hypocalcemia due to a lack of parathyroid hormone. On x-ray, the thymic shadow is absent. A failure of development and differentiation of which of the following embryonic structures would most likely be responsible for the observed presentation?
The table below shows the fall in blood
pressure that occurs for the various types of blood vessels as blood flows
from the aorta (100 mm Hg) to the right atrium (0 mm Hg). Which of the
following types of blood vessel is likely to have the highest ratio of wall
cross-sectional area to lumen cross-sectional area
A patient complaining of chest pain with exercise is evaluated by cardiac catheterization. The left anterior descending (LAD) branch of the coronary artery is visualized but the contrast angiography is poor. A Doppler-tipped catheter is inserted and the blood velocity is observed to increase transiently from 10 cm/sec to 70 cm/sec and then decrease back to 10 cm/sec as the probe passes a particular location in the artery. What was the cause of these changes in velocity measurements?
A 25-year-old male gets into a brawl outside a bar. During the altercation, someone pulls out a gun and shoots him in the head. The bullet enters the man's temple and severs his right optic nerve completely. He is quickly transported to a nearby emergency room and an emergency physician tests his pupillary response by shining a light in the right eye. What will the physician most likely find?
The maximum expiratory flow-volume curve shown above is created when the patient inhales as much air as possible and then expires with maximum effort until no more air can be expired. What is the forced vital capacity of this patient?
A 26-year-old man is admitted through the
emergency department to the hospital for a heroin overdose. His heart rate is
45 beats/min, and his blood pressure is 75/40 mm Hg. Which of the following
best depicts the results from an arterial blood sample?
A macroscopic hepatic change known as nutmeg liver is indicative of
In which of the following organs are fenestrated endothelial cells common?
A 45-year-old male presents to the physician with muscle cramps, perioral numbness, and irritability over the past 3 to 4 months. Lab results reveal hypocalcemia, normal albumin level, and hyperphosphatemia. Parathyroid hormone level is decreased. Alkaline phosphatase level is normal. Which of the following is most likely causing this clinical scenario?
A newborn baby has a prominent defect at the base of his spine through which his meninges and spinal cord protrude. A failure of which of the following processes is the most common cause of this type of defect?