Urinalysis Exam 1 (CH 2-5) Questions and Answers 100% Pass

Urinalysis Exam 1 (CH 2-5) Questions and Answers 100% Pass Before analysis, what must be done with a refrigerated urine specimen? A) warmed to 37°C B) checked for crystal formation C) inspected for changes in color D) returned to room temperature Explanation: To prepare a refrigerated urine specimen for analysis, it should be allowed to return to room temperature. This ensures that any temperature-induced changes in the specimen are minimized before testing. What is the primary cause of changes in unpreserved urine? A) bacterial growth B) prolonged exposure to light C) oxidation of chemical constituents D) precipitation of crystals 2 Explanation: Unpreserved urine undergoes chemical changes primarily due to the oxidation of its chemical constituents. This process can alter the composition of the urine over time, affecting test results. What decreases in an unpreserved urine specimen left at room temperature overnight? A) bacterial count B) specific gravity and pH C) glucose and ketones D) color intensity and specific gravity Explanation: Glucose and ketones tend to degrade over time in an unpreserved urine specimen left at room temperature overnight, leading to decreased levels of these substances. A laboratory may reject a specimen for all of the following reasons except: A) Label does not match the requisition form B) Specimen is contaminated with feces C) External contamination on the container 3 D) The container has a screw-top lid Explanation: Using a screw-top lid on the container is not typically a reason for rejection by a laboratory. However, other factors like contamination