ATI RN
Questions About The Urinary System Questions
Question 1 of 5
Most enzymes function optimally at pH?
Correct Answer: B
Rationale: Most enzymes function optimally at pH 7.4 physiological blood pH (e.g., neutral catalysis). 7.8 is alkalotic disrupts activity. 6.8 is acidic suboptimal. 2 is gastric extreme. Physiological pH distinguishes it, key to enzyme kinetics, unlike alkaline, acidic, or gastric values.
Question 2 of 5
The primary organs of the urinary system are:
Correct Answer: B
Rationale: Kidneys, ureters, bladder, and urethra form the urinary system not liver/gallbladder (digestive), stomach/intestines (GI), or pancreas/spleen (endocrine/digestive). This lists core components, key for urine production/excretion, contrasting with non-urinary organs.
Question 3 of 5
Aldosterone regulates:
Correct Answer: A
Rationale: Aldosterone retains Na+ and excretes K+ not glucose (insulin), oxygen (lungs), or protein (liver). This specifies electrolyte control, critical for blood pressure, contrasting with unrelated functions.
Question 4 of 5
The presence of blood in urine is called:
Correct Answer: B
Rationale: Hematuria is blood in urine not glycosuria (glucose), proteinuria (protein), or anuria (no urine). This terms a key symptom, critical for injury/infection detection, contrasting with other conditions.
Question 5 of 5
The main nitrogenous waste excreted in urine is:
Correct Answer: B
Rationale: Urea is the primary nitrogenous waste not glucose (reabsorbed), hemoglobin (RBCs), or protein (filtered). This identifies excretion target, critical for nitrogen balance, contrasting with reabsorbed/blood components.