ATI RN
Questions On The Urinary System Questions
Question 1 of 5
The Renal blood flow is:
Correct Answer: D
Rationale: Renal blood flow (20-25% cardiac output) decreases with sympathetic stimulation (vasoconstriction), not 5%, medullary dominance, or universal BP effect (autoregulated). This distinguishes renal hemodynamics, key for stress response, contrasting with flow distribution.
Question 2 of 5
The anterior surface of the kidneys (either right or left) is related directly to the following structure without intervening peritoneum:
Correct Answer: A
Rationale: Right kidney's anterior surface contacts the liver (bare area) without peritoneum not pancreas, spleen, stomach, or colon (peritonealized). This distinguishes renal relations, key for surgical anatomy, contrasting with peritoneal structures.
Question 3 of 5
The gold standard investigation in the evaluation of Urolithiasis is
Correct Answer: B
Rationale: Non-contrast CT (NCCT) is the gold standard for urolithiasis detects size, location, density (e.g., Hounsfield units) with high sensitivity, guiding management. MRI excels in soft tissue, not stones poor specificity. Digital tomosynthesis is experimental, less detailed limited use. Micro CT is lab-based, not clinical impractical. NCCT's diagnostic precision distinguishes it, critical for rapid, accurate stone assessment, unlike tissue, emerging, or research tools.
Question 4 of 5
Brown colour in Semen is seen
Correct Answer: B
Rationale: Brown semen (hematospermia) in spinal cord injury reflects blood from neurogenic dysfunction or catheterization common association. Infection typically causes pus/yellow, not brown different etiology. Medications (e.g., rifampin) alter urine, not semen color unrelated. Sexual activity may cause transient blood, but not specific less likely. Spinal injury's link distinguishes it, key to neurogenic hematospermia, unlike infection, drug, or activity causes.
Question 5 of 5
The primary pacemaker cells for Ureteral peristalsis are
Correct Answer: D
Rationale: Atypical smooth muscle cells in the proximal ureter (pelviureteric junction) act as primary pacemakers initiate peristalsis, driving urine flow. ICC-like cells (telocytes) assist, not primary supportive. Latent pacemakers dominate if primary fail backup. Distal location fits bladder, not ureter wrong site. Atypical muscle's role distinguishes it, critical for ureteral propulsion, unlike secondary, backup, or misplaced cells.