NEET Biology: Excretory Products and Their Elimination — Practice Set 6

Q1. Which of the following statements regarding urine concentration is incorrect?

A. The Loop of Henle plays a crucial role in urine concentration.
B. ADH increases water permeability of the collecting ducts.
C. Aldosterone directly controls urine concentration by absorbing water.
D. The medullary gradient is essential for urine concentration.

Q2. Which of the following conditions is characterized by the absence of ADH?

A. Diabetes mellitus
B. Diabetes insipidus
C. Glomerulonephritis
D. Uremia

Q3. Which of the following statements about the role of ADH in water balance is correct?

A. ADH increases water permeability of the collecting ducts.
B. ADH decreases water reabsorption in the nephron.
C. ADH is secreted by the adrenal cortex.
D. ADH promotes sodium excretion in urine.

Q4. Which statement about renal circulation is incorrect?

A. The afferent arteriole carries blood into the glomerulus.
B. The efferent arteriole carries blood away from the glomerulus.
C. The renal vein carries oxygenated blood from the kidney.
D. Peritubular capillaries are involved in reabsorption.

Q5. Which of the following statements about renal circulation is incorrect?

A. The afferent arteriole carries blood into the glomerulus.
B. The efferent arteriole carries blood away from the glomerulus.
C. The renal vein carries oxygenated blood from the kidney.
D. Peritubular capillaries are involved in reabsorption.

Q6. Which part of the nephron is impermeable to water but allows active transport of ions?

A. Proximal convoluted tubule
B. Descending limb of Henle’s loop
C. Ascending limb of Henle’s loop
D. Collecting duct

Q7. What is the function of the renal corpuscle?

A. Reabsorption of glucose
B. Ultrafiltration of blood
C. Formation of concentrated urine
D. Secretion of ammonia

Q8. Which of the following statements about the nephron is correct?

A. The nephron is the structural and functional unit of the liver.
B. The glomerulus is responsible for filtration of blood.
C. The Loop of Henle is involved in glucose reabsorption.
D. The collecting duct is the primary site of filtration.

Q9. Which waste product is excreted in the urine due to muscle metabolism?

A. Uric acid
B. Ammonia
C. Creatinine
D. Bilirubin

Q10. Which of the following statements about urine composition is incorrect?

A. Urine contains urea, creatinine, and uric acid.
B. Urine normally contains a high concentration of proteins.
C. Urine pH is slightly acidic.
D. Urine composition varies based on hydration and diet.

Biology — Excretory Products and Their Elimination

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Which of the following statements regarding urine concentration is incorrect?

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