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Question
Describe the structure of renal tubule with neatly labeled diagram.
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Solution
The renal tubule is the portion of the nephron containing the tubular fluid filtered through the glomerulus. After passing through the renal tubule, the filtrate continues to the collecting duct system.
The components of the renal tubule are:- Proximal convoluted tubule: The filtrate in the Bowman's space enters the first duct in the renal tubule. This duct is called the proximal convoluted tubule, which is a section of the renal tubule located in the kidney's cortex that is responsible for the reabsorption of the majority of ultrafiltrate.=
- The next duct of the renal tubule in line to collect the scraps left by the proximal tubule is called the loop of Henle. The loop of Henle is a long duct mainly located in the kidney's medulla that creates a concentration gradient, called a countercurrent exchange system, that allows for the reabsorption of water. While the majority of water, like the rest of the ultrafiltrate, was reabsorbed by the proximal convoluted tubule, the loop of Henle is involved in absorbing even more water in order to create concentrated urine.
- Once the filtrate passes through the thick ascending limb of Henle, it enters the distal convoluted tubule, which is a duct of the renal tubule located in the kidney's cortex that reabsorbs calcium, sodium, and chloride and regulates the pH of urine by secreting protons and absorbing bicarbonates.
The components of the renal tubule are:
- Proximal convoluted tubule: The filtrate in the Bowman's space enters the first duct in the renal tubule. This duct is called the proximal convoluted tubule, which is a section of the renal tubule located in the kidney's cortex that is responsible for the reabsorption of the majority of ultrafiltrate.=
- The next duct of the renal tubule in line to collect the scraps left by the proximal tubule is called the loop of Henle. The loop of Henle is a long duct mainly located in the kidney's medulla that creates a concentration gradient, called a countercurrent exchange system, that allows for the reabsorption of water. While the majority of water, like the rest of the ultrafiltrate, was reabsorbed by the proximal convoluted tubule, the loop of Henle is involved in absorbing even more water in order to create concentrated urine.
- Once the filtrate passes through the thick ascending limb of Henle, it enters the distal convoluted tubule, which is a duct of the renal tubule located in the kidney's cortex that reabsorbs calcium, sodium, and chloride and regulates the pH of urine by secreting protons and absorbing bicarbonates.
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