A urine specimen collected on an apparently healthy 25-year old man shortly he finished eating lunch was cloudy but showed normal results on a multiple reagent test strip analysis.  The most likely cause of the turbidity is:

The gold standard confirmation method for positive drug screens that gives greatest accuracy is:

Considering the classification of hormones by structure, an example of a steroid hormone would be

The finding of a large amount of uric acid crystals in a urine specimen from a 6-month-old boy

The troponin complex consists of:

A four-member family who eat significantly amount of fish has become ill and visits their family practitioner. Their symptoms include stumbling (ataxia), impaired speech, and visual field loss. No Mees’ lines are observed. Being environmentally conscious, they have their home examined for toxic gases. All tests are negative. Based on their history and symptoms, what toxic metal might be to blame?               

An individual with a history of miscarriage visits her physician to discuss her positive hCG test done with a qualitative point-of-care device. The patient says she “feels pregnant” but wants to be certain. Following an ultrasound analysis, she is diagnosed with a germ cell tumor of unknown type. What two tumor markers are useful in classifying germ cell tumors?

To aid in the diagnosis of skeletal muscle disease, which of the following serum enzyme measurements would be most use?

A patient’s total cholesterol is 300 mg/dL, his HDL cholesterol is 50 mg/dL, and his triglyceride is 200 mg/dL.  What is this patient’s calculated LDL cholesterol?

Which of the following is a low-weight protein that is found on the cell surface of nucleated cells?