Question

Which of the following ducts lead into the collecting tubules?
A. Tertiary duct
B. Duct of Bellini
C. Henle’s loop
D. Bowman’s capsule

Answer 1

Hint: Nephron consists of glomerulus, Bowman’s capsule, Henle’s loop, distal convoluted tubule, proximal convoluted tubule, collecting duct and duct of Bellini. Bowman’s capsule is the first part to collect blood for ultra filtration than it comes to PCT and Henle’s loop. DCT is connected to collecting ducts and then to the duct of the Bellini.

Complete answer:
Kidney consists of many filtration units called nephron. Nephron contains a glomerular capsule, henle’s loop, PCT, DCT and collecting duct. The collecting duct is the last part of the nephron. It participates in the electrolyte and fluid balance through reabsorption and excretion. Hormones, aldosterone and vasopressin help to regulate the process. Collecting duct contains connecting tubules, cortical collecting tubules, cortical collecting ducts and medullary collecting ducts.
Duct of Bellini is also called a renal collecting tubule. It helps to transport the urine from the nephrons to larger ducts that connect with the renal calyces. It concentrates and transports urine from the nephrons. Urine collects in it until it flows through the renal pelvis and ureter to the urinary bladder.
Henle’s loop extends from the proximal tubule. It has an ascending and descending loop. It receives filtrate from the proximal convoluted tubule. It connects with the distal convoluted tubule.
The Bowman capsule is also known as a glomerular capsule. It collects the ultra-filtered blood from the glomerulus. Renal tubule then collects the filtrate.
From the above information we have found that the Duct of Bellini leads into the collecting tubules.

Hence, the correct answer is option (B).

Note: Nephron plays a very important role in reabsorption and absorption. It uses four mechanisms to convert blood into urine: filtration, re-absorption, secretion, and excretion. During the course of nephron, the structure and function of the epithelial cells lining. Descending limbs of Henle’s loop are permeable to water and less permeable to salt. Distal convoluted tubules have numerous mitochondria which provide enough energy for the active transport of the molecules.