What is the order of filtrate passage through the nephron?

What is the order of filtrate passage through the nephron?

• A. Bowman's capsule → loop of Henle → proximal tubule → distal tubule → collecting duct
• B. Proximal tubule → collecting duct → loop of Henle → Bowman's capsule → distal tubule
• C. Collecting duct → Bowman's capsule → loop of Henle → proximal tubule → distal tubule
• D. Bowman's capsule → proximal tubule → loop of Henle → distal tubule → collecting duct

Answer: (D)

The correct sequence of filtrate passage through the nephron is Bowman's capsule, proximal tubule, loop of Henle, distal tubule, and then the collecting duct. Starting with Bowman's capsule, this is where the filtration of blood takes place, allowing water, ions, and small molecules to enter the nephron as filtrate. Following this, the filtrate moves into the proximal tubule, where a significant amount of reabsorption occurs. This includes the reclaiming of valuable substances such as glucose, amino acids, and a substantial amount of water and ions. Next, the filtrate passes into the loop of Henle, which has a crucial role in creating a concentration gradient in the kidney's medulla through a process known as countercurrent multiplication. This section is vital for the reabsorption of water and sodium, which contributes to the concentration of urine. After the loop of Henle, the filtrate enters the distal tubule, where further reabsorption occurs, along with secretion of additional wastes and ions, notably potassium and hydrogen ions. This part fine-tunes the composition of the filtrate. Finally, the filtrate moves into the collecting duct, which is responsible for the final concentration of urine, as it re

The correct sequence of filtrate passage through the nephron is Bowman's capsule, proximal tubule, loop of Henle, distal tubule, and then the collecting duct.

Starting with Bowman's capsule, this is where the filtration of blood takes place, allowing water, ions, and small molecules to enter the nephron as filtrate. Following this, the filtrate moves into the proximal tubule, where a significant amount of reabsorption occurs. This includes the reclaiming of valuable substances such as glucose, amino acids, and a substantial amount of water and ions.

Next, the filtrate passes into the loop of Henle, which has a crucial role in creating a concentration gradient in the kidney's medulla through a process known as countercurrent multiplication. This section is vital for the reabsorption of water and sodium, which contributes to the concentration of urine.

After the loop of Henle, the filtrate enters the distal tubule, where further reabsorption occurs, along with secretion of additional wastes and ions, notably potassium and hydrogen ions. This part fine-tunes the composition of the filtrate.

Finally, the filtrate moves into the collecting duct, which is responsible for the final concentration of urine, as it re