Usual chest radiograph findings on a patient with a large pleural effusion include:1.   blunting of the costophrenic angle.2.   fluid level on the affected side.3.   mediastinal shift to the unaffected side.4.   mediastinal shift to the affected side.

The causes of a transudative pleural effusion include:1.   congestive heart failure.2.   fungal pneumonia.3.   pulmonary embolism.4.   hemothorax.

All of the following are evaluated during a polysomnographic sleep study, EXCEPT:

Which of the following prevents the aspiration of foods and liquids?

List the structures of the electrical conduction system of the heart beginning with where the impulse starts. 

Deoxygenated blood from systemic circulation enters the heart at the 

Let sets and be defined as follows:

(6 points for the correct answer; 2 bonus point if you have correctly answered a total of 9 questions among questions 1 through 11.)  Consider the following proof of the fact that the product of any two odd integers is odd:  Suppose and . Then and are two odd integers. Since is an odd integer, it follows that the product of two odd integers and is odd.  Is the proof valid? 

Define 

Suppose m and n are integers such that  and .  Then   (Please enter your answer as an integer in the blank.)