The functional unit of the human kidney where filtration occurs is the: MCQ with Answer and Explanation

The functional unit of the human kidney where filtration occurs is the:
A. Loop of Henle
B. Bowman's capsule
C. Renal corpuscle
D. Distal tubule
Answer: Option C
Solution (By JKSSB Mock Tests)
The renal corpuscle consists of the glomerulus (capillary tuft) and Bowman's capsule. This is where ultrafiltration of blood occurs. The filtrate then passes through the proximal tubule, loop of Henle, distal tubule, and collecting duct. The loop of Henle concentrates urine, the tubules reabsorb and secrete. The nephron is the complete functional unit.

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Practice More Biology Questions

Question #1
The structure that carries urine from the kidney to the bladder is the:
A. Urethra
B. Ureter
C. Calyx
D. Renal pelvis

Correct Answer: Option B


Explanation:
The ureters are two muscular tubes that propel urine from the renal pelvis of each kidney to the urinary bladder via peristaltic contractions. Urethra exits bladder, renal pelvis and calyces are within the kidney.

This question belongs to: Science Biology
Question #2
The type of immunity that is present from birth is:
A. Passive immunity
B. Active immunity
C. Innate immunity
D. Adaptive immunity

Correct Answer: Option C


Explanation:
Innate (natural) immunity is non-specific, present at birth, and provides the first line of defense. It includes physical barriers (skin), phagocytes, and chemical defenses. Adaptive immunity is acquired and specific.

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Question #3
Consider the following statements about viruses:
1. The tobacco mosaic virus was the first virus discovered.
2. Viruses can have a protein coat called capsid.
3. Viruses can reproduce outside host cells.
Which of the above is/are correct?
A. 2 and 3 only
B. 1, 2, and 3
C. 1 and 3 only
D. 1 and 2 only

Correct Answer: Option D


Explanation:
TMV was discovered by Ivanovsky. Viruses have a capsid. They require host cells to replicate, so 3 is incorrect.

This question belongs to: Science Biology