Which of the following can cause a false postive nitrite result?

A 47-year-old male and father of five works as a high school English teacher. He recently read in the community newspaper that local sewage is treated and repurposed to the community as drinking water. His senior English class is concerned about the quality of drinking water in the city and they want to petition the state senate to pass a bill barring the practice. He comes to the local health department asking for information.

Which immune cell type is primarily responsible for producing antibodies in response to the chickenpox virus? 

All of the following are considered functions of the kidney EXCEPT?

The presence of a few waxy casts is considered normal?

Identify the epithelial cell found most often in a urine microscopic exam. 

Which of the following explains how the plasma is moved through the glomerulus?

Select the abnormal result for a seminal fluid volume .

What is the purpose of the polarizer (polarizing filter 1) in a polarized microscope?

A post-vasectomy sample is received into the lab. You mix the sample well and place a drop of specimen on a slide. After covering it with a coverslip, you examine it under the microscope. No sperm are seen on the slide. What is the next step?