A 50-year-old female is evaluated by her physician for recent weight gain. Physical examination is notable for truncal obesity, wasting of her distal musculature and moon facies. In addition she complains of abnormal stretch marks that surround her abdomen. The physician suspects pituitary adenoma. Which of the following high-dose dexamethasone suppression test findings and baseline ACTH findings would support his view?

A 72-year-old woman with a past medical history of diabetes and obesity presents to the clinic with joint pain. She has severe pain in both of her knees for which she has been taking ibuprofen daily. Her temperature is 98.2°F (36.8°C), blood pressure is 177/109 mmHg, pulse is 80/min, respirations are 15/min, and oxygen saturation is 98% on room air. Physical exam is notable for the finding in the image (see below). Radiography of the knee shows narrowing of the joint space. Which of the following is the most likely diagnosis?

A 65-year-old female is admitted to the ER with a 3-hour history of cyanosis, shortness of breath, and substernal chest pain.  She had been discharged 5 days earlier after having a total hip replacement due to severe osteoarthritis.  The hip surgery was uneventful.  On examination, the patient is in obvious acute respiratory distress.  Her respiratory rate is 40/min and her breathing is labored.  The patient’s room air oxygen saturation level is 86%.  Her blood pressure is 100/70 mm Hg.  Cyanosis is present.  Cardiac examination reveals increased pulmonic component of the second heart sound (S2).  Abnormal lung sounds, including rales and wheezes, are present bilaterally.  Based on the information provided, which of the following tests will be the preferred intervention to establish the diagnosis?

The prefix in the term “hyperventilation” means which of the following terms below.

Q5. What command can be typed to increase the display thickness of lines on screen (without changing their actual plotted weight)?

Q1. In AutoCAD, what is a selection set?

A Carnot engine operates between a high temperature reservoir at [Th] K and a river with water at [Tc] K. If it absorbs [Q] J of heat each cycle, how much work per cycle does it perform in joules? Enter only a numerical value (3 sig. fig) without units.

The mean free path of an oxygen molecule is [l] m, when the gas is at a pressure of [p] Pa and a temperature of [t] K. The molar mass of oxygen is 32.0 g/mol. Assuming that the molecules are moving at their root-mean-square speeds, what is the average time interval between collisions of an oxygen molecule in nanoseconds? 1 ns = 10-9 s Boltzmann constant = 1.38 × 10-23 J/K Avogadro’s number = 6.02 × 1023 molecules/mole R = 8.314 J/mol · K = 0.0821 L · atm/mol · K.  Enter only a numerical value (3 sig. fig) without units.

A refrigerator has a coefficient of performance equal to [c]. How much work in joules must be done on the refrigerator in order to remove [Qc] J of heat from the interior? Enter only a numerical value with three significant figures and without units. 

Picture5.png Identify the histological structure represented A in the image above