Question:
Which of the following are the modified smooth muscles of the afferent arteriole?
Which of the following are the modified smooth muscles of the afferent arteriole?
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Afferent arteriole → Juxtaglomerular cells → Renin secretion.
Updated On: Jul 18, 2026
- Juxtaglomerular cells
- Vasa recta
- Glomerulus
- Peritubular network
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The Correct Option is A
Solution and Explanation
Step 1: Understanding nephron structure.
The nephron is the functional unit of kidney. It includes structures involved in filtration and regulation of blood pressure and filtration rate.
Step 2: Afferent arteriole specialization.
The wall of the afferent arteriole contains specialized smooth muscle cells. These cells are modified to perform endocrine function.
Step 3: Juxtaglomerular cells.
Juxtaglomerular (JG) cells are modified smooth muscle cells present in the afferent arteriole. They secrete renin, which regulates blood pressure.
Step 4: Function of renin secretion.
Renin activates the renin-angiotensin system, controlling glomerular filtration rate and systemic blood pressure.
Step 5: Evaluation of other options.
Vasa recta and peritubular networks are capillary structures, while glomerulus is a filtration unit, not modified smooth muscle.
Step 6: Final conclusion.
Thus, juxtaglomerular cells are modified smooth muscles of the afferent arteriole.
The nephron is the functional unit of kidney. It includes structures involved in filtration and regulation of blood pressure and filtration rate.
Step 2: Afferent arteriole specialization.
The wall of the afferent arteriole contains specialized smooth muscle cells. These cells are modified to perform endocrine function.
Step 3: Juxtaglomerular cells.
Juxtaglomerular (JG) cells are modified smooth muscle cells present in the afferent arteriole. They secrete renin, which regulates blood pressure.
Step 4: Function of renin secretion.
Renin activates the renin-angiotensin system, controlling glomerular filtration rate and systemic blood pressure.
Step 5: Evaluation of other options.
Vasa recta and peritubular networks are capillary structures, while glomerulus is a filtration unit, not modified smooth muscle.
Step 6: Final conclusion.
Thus, juxtaglomerular cells are modified smooth muscles of the afferent arteriole.
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