Through partial voiding before collection, which part of the body is cleared of contaminants such as bacteria, mucus, cells, or other debris that could adversely affect the results?

Urethra

Which of the following urine samples is the best for testing because the urine, having been in the bladder overnight, is the most concentrated specimen?

The first morning specimen

Which of the following is the first step in collecting a specimen for testing?

Verify the correct patient

Catheterization includes the introduction of a sterile plastic tube into the: