Examkin

Question

Difficulty: EasyExcretion and Excretory Organs

Arrange the following structures of the mammalian nephron in the correct sequence through which fluid flows during the process of urine formation, starting from the site of ultrafiltration.

  1. 1Bowman's capsule
  2. 2Proximal convoluted tubule
  3. 3Loop of Henle
  4. 4Distal convoluted tubule
  5. 5Collecting duct

Answer

The correct sequence of fluid flow through the nephron is: Bowman's capsule → Proximal convoluted tubule → Loop of Henle → Distal convoluted tubule → Collecting duct.
During urine formation, ultrafiltration forces fluid out of the renal capillaries into Bowman's capsule. The filtrate then flows into the proximal convoluted tubule, travels down and up the loop of Henle, enters the distal convoluted tubule, and finally drains into the collecting duct.

Step-by-Step Solution

1
Identify the initial receiving structure for glomerular filtrate.
Ultrafiltration pushes fluid from the glomerulus directly into Bowman's capsule.
Bowman's capsule encapsulates the glomerulus and collects the fluid forced out under high hydrostatic pressure.
2
Trace the sequential pathway through the tubular regions of the nephron.
The filtrate travels from Bowman's capsule into the proximal convoluted tubule, down into the hairpin loop of Henle, and up into the distal convoluted tubule.
This anatomical order allows step-by-step selective reabsorption of glucose, amino acids, and ions followed by osmotic regulation.
3
Determine the final duct that collects urine from the nephron unit.
The processed fluid drains from the distal convoluted tubule into the collecting duct.
The collecting duct gathers urine from several distal convoluted tubules and routes it to the ureter.

Key Concept

Pathway of fluid flow through the functional unit (nephron) of the mammalian kidney during urine formation.
Rate this question

Topics

Excretion and Excretory Organs

More questions from this topic