A patient comes into the emergency department complaining of abdominal pain and hematemesis.  The patient describes the vomit as looking like coffee grounds.  What is the most likely cause in this patient?

Psoas and obturator signs can be helpful in the diagnosis of: 

A previously independent 98-year-old woman presents with acute onset of confusion and fatigue. Her daughter found her in bed early this afternoon and would like to have her admitted. The nurse suspects which of the following conditions? 

The small intestine contains microvilli, villi and circular folds. Select their main function:

What is the pathophysiology underlying the pain (renal colic) related to kidney stones?

Select the symptoms/signs that occur with isolated right heart failure: (Select all that apply)

Select the symptoms/signs that occur with isolated right heart failure: (Select all that apply)

The small intestine contains microvilli, villi and circular folds. Select their main function:

Which of the following patient is most likely to have chronic obstructive pulmonary disease (COPD)?

What is the pathophysiology underlying the pain (renal colic) related to kidney stones?