Collection of cortical tissues found between the pyramids are called:

Correct Answer: B

Rationale: Renal columns of Bertin are cortical tissue between pyramids not rays, interlobular, or none. This repeats Q4/Q30, key for anatomy, contrasting with other terms.

Correct Answer: C

Rationale: Ureteric bud sprouts from the mesonephric duct not urogenital sinus, vesicourethral canal, paramesonephric duct, or cloaca. This origin drives metanephric induction, key for kidney formation, contrasting with unrelated structures.

Correct Answer: D

Rationale: Bladder forms from vesicourethral canal (body), allantois (apex), and mesonephric ducts (trigone) all apply. 'All' captures full origin, key for anatomy, contrasting with partial selections.

Correct Answer: B

Rationale: Kidneys maintain acid-base balance by excreting H and reabsorbing HCO₃⁻ e.g., PCT reclaims HCO₃⁻, distal tubule secretes H . Excreting both loses buffer acidosis risk. Reabsorbing H /excreting HCO₃⁻ reverses alkalosis. Reabsorbing both retains acid imbalanced. H excretion/HCO₃⁻ retention distinguishes it, key to pH regulation, unlike dual loss or retention.

Correct Answer: D

Rationale: The trigone is the bladder's three openings two ureters, one urethra (e.g., triangular region). Detrusor is muscle not openings. Rugae are folds not specific. Cortex is kidney not bladder. Trigone's anatomical term distinguishes it, key to bladder structure, unlike muscle or unrelated areas.