ATI RN
Questions About The Urinary System Questions
Question 1 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.
Question 2 of 5
The distal convoluted tubules have
Correct Answer: D
Rationale: DCT has faint acidophilic cytoplasm, basal infoldings, and large mitochondria all true. This describes DCT histology, critical for ion transport, contrasting with partial traits.
Question 3 of 5
After the renal artery divides in the hilum, blood circulating to the kidney flows through the
Correct Answer: A
Rationale: Blood flows: interlobar → arcuate → interlobular → afferent not other sequences. This orders renal circulation, critical for perfusion, contrasting with misordered paths.
Question 4 of 5
Renal lobule includes
Correct Answer: C
Rationale: Renal lobule is a medullary ray plus draining nephrons not pyramid (lobe), cortex, or artery-based. This defines cortical unit, key for histology, contrasting with lobe or vascular definitions.
Question 5 of 5
The function of collecting tubules
Correct Answer: B
Rationale: Collecting tubules reabsorb ~9% water (ADH-dependent) not K+ (DCT), 80% (PCT), or Na+ (earlier). This specifies water role, key for concentration, contrasting with earlier reabsorption.