The kidney secretes which is an enzyme hormone that raises blood pressure.

Correct Answer: B

Rationale: Renin, an enzyme from JG cells, initiates RAAS to raise BP, not aldosterone (steroid), angiotensinogen (substrate), or angiotensin II (product). This identifies BP regulator, critical for hypertension, contrasting with downstream factors.

Correct Answer: C

Rationale: Distal convoluted tubule follows the ascending limb, not descending (before), PCT (earlier), or collecting duct (later). This sequences nephron flow, critical for reabsorption, contrasting with misordering.

Correct Answer: C

Rationale: Liver on the right displaces the right kidney lower, not size differences or heart (left). This explains asymmetry, key for anatomical positioning, contrasting with organ size myths.

Correct Answer: C

Rationale: Nephrons filter/form urine, not hilum (entry), neurons (nerve), or medulla (region). This defines functional unit, key for renal physiology, contrasting with structural terms.

Correct Answer: B

Rationale: Nephron performs filtration, reabsorption, secretion not neuron (nerve), alveoli (lung), or none. This defines nephron function, critical for urine formation, contrasting with other units.