Collections of cortical tissue found between the medullary pyramids are called

Correct Answer: B

Rationale: Renal columns of Bertin are cortical tissue between pyramids not medullary rays (cortex to medulla), interlobular cortex (misnomer), or none. This defines cortical extensions, critical for kidney structure, contrasting with medullary or vague terms.

Correct Answer: A

Rationale: Blood flows: interlobar → arcuate → interlobular → afferent not other sequences. This orders renal circulation, critical for perfusion, contrasting with misordered paths.

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.

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.

Correct Answer: C

Rationale: Peritubular capillaries are glomerular (efferent) not non-glomerular like capsular, terminal, or recta vera. This corrects circulation type, critical for reabsorption, contrasting with post-glomerular inclusion.