ATI RN
Questions About The Urinary System Questions
Question 1 of 5
Most absorption and secretion occurs in this part of the nephron.
Correct Answer: A
Rationale: PCT handles ~65-70% reabsorption and secretion not loop, DCT, or collecting (fine-tuning). This specifies primary site, key for filtrate processing, contrasting with later segments.
Question 2 of 5
The micturition reflex center is located in the _____.
Correct Answer: D
Rationale: Micturition reflex is in sacral plexus (S2-S4) not pons, midbrain, or lumbar. This locates control, key for voiding, contrasting with higher centers.
Question 3 of 5
ADH has which of the following effects on the distal convoluted tubule?
Correct Answer: B
Rationale: ADH increases water reabsorption in DCT/collecting duct not decreasing, diluting, or increasing volume. This defines antidiuretic action, key for concentration, contrasting with diuretic effects.
Question 4 of 5
This happens if the proximal convoluted tubule is removed from nephron
Correct Answer: A
Rationale: PCT removal halts ~65% reabsorption, stopping urine formation not unaffected, concentrated, or diluted. This underscores PCT role, critical for processing, contrasting with later adjustments.
Question 5 of 5
Which cells of the JGA act as mechanoreceptors?
Correct Answer: B
Rationale: Juxtaglomerular cells in the JGA act as mechanoreceptors sense afferent arteriole pressure (e.g., stretch), releasing renin to adjust GFR. Macula densa cells are chemoreceptors monitor NaCl, not pressure. Intercalated cells (collecting duct) manage acid-base no JGA role. Principal cells (collecting duct) handle water/Na unrelated. Juxtaglomerular cells' pressure-sensing distinguishes them, critical for autoregulation, unlike chemical or distant tubular cells.