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Juxtaglomerular apparatus is made up of
- a)juxtaglomerular cell, macula densa and lads cell
- b)juxtaglomerular cell, Purkinje cell and chief cell
- c)juxtaglomerular cell, lads cell and myoepithelial cell
- d)juxtaglomerular cell, macula densa and argentaffin cell
Correct answer is option 'A'. Can you explain this answer?
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Juxtaglomerular apparatus is made up ofa)juxtaglomerular cell, macula ...
Juxtaglomerular cells are the smooth muscle cells of both the afferent and efferent arterioles that are swollen and contain dark granules. These cells secrete renin. Macula densa are the epithelial cells of the distal convoluted tubule that come in contact with the afferent and efferent arterioles. These cells are more dense than the other tubular cells. They act as chemoreceptors. Lacis cells are located in the interval between the macula densa and the afferent and efferent arterioles. The function of lacis cells is unknown. All these cells make up juxtaglomerular apparatus.
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Juxtaglomerular apparatus is made up ofa)juxtaglomerular cell, macula ...
The juxtaglomerular apparatus is an important structure located in the kidney. It plays a crucial role in regulating blood pressure and kidney function. It is composed of three main components: juxtaglomerular cells, macula densa, and lacis cells.
1. Juxtaglomerular cells:
- Juxtaglomerular cells, also known as granular cells, are specialized smooth muscle cells found in the afferent arterioles of the kidney.
- These cells contain secretory granules called renin, which plays a central role in the regulation of blood pressure.
- When stimulated, juxtaglomerular cells release renin into the bloodstream, which initiates a cascade of events leading to the production of angiotensin II, a potent vasoconstrictor.
- Renin release is regulated by various factors, including blood pressure, sympathetic nervous system activity, and sodium levels in the kidney.
2. Macula densa:
- The macula densa is a group of specialized epithelial cells located in the distal convoluted tubule of the nephron, near the juxtaglomerular cells.
- These cells are sensitive to changes in sodium chloride concentration in the urine.
- When sodium chloride levels are low, the macula densa sends signals to the juxtaglomerular cells to release renin.
- This mechanism helps maintain appropriate sodium and water balance in the body by regulating blood pressure and kidney function.
3. Lacis cells:
- Lacis cells, also known as extraglomerular mesangial cells, are located between the afferent and efferent arterioles at the vascular pole of the renal corpuscle.
- These cells have contractile properties and contribute to the regulation of blood flow within the glomerulus.
- Lacis cells also provide structural support to the juxtaglomerular apparatus.
In summary, the juxtaglomerular apparatus is made up of juxtaglomerular cells, macula densa, and lacis cells. These components work together to regulate blood pressure and kidney function by sensing changes in sodium chloride concentration and releasing renin when necessary.
1. Juxtaglomerular cells:
- Juxtaglomerular cells, also known as granular cells, are specialized smooth muscle cells found in the afferent arterioles of the kidney.
- These cells contain secretory granules called renin, which plays a central role in the regulation of blood pressure.
- When stimulated, juxtaglomerular cells release renin into the bloodstream, which initiates a cascade of events leading to the production of angiotensin II, a potent vasoconstrictor.
- Renin release is regulated by various factors, including blood pressure, sympathetic nervous system activity, and sodium levels in the kidney.
2. Macula densa:
- The macula densa is a group of specialized epithelial cells located in the distal convoluted tubule of the nephron, near the juxtaglomerular cells.
- These cells are sensitive to changes in sodium chloride concentration in the urine.
- When sodium chloride levels are low, the macula densa sends signals to the juxtaglomerular cells to release renin.
- This mechanism helps maintain appropriate sodium and water balance in the body by regulating blood pressure and kidney function.
3. Lacis cells:
- Lacis cells, also known as extraglomerular mesangial cells, are located between the afferent and efferent arterioles at the vascular pole of the renal corpuscle.
- These cells have contractile properties and contribute to the regulation of blood flow within the glomerulus.
- Lacis cells also provide structural support to the juxtaglomerular apparatus.
In summary, the juxtaglomerular apparatus is made up of juxtaglomerular cells, macula densa, and lacis cells. These components work together to regulate blood pressure and kidney function by sensing changes in sodium chloride concentration and releasing renin when necessary.
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Juxtaglomerular apparatus is made up ofa)juxtaglomerular cell, macula densa and lads cellb)juxtaglomerular cell, Purkinje cell and chief cellc)juxtaglomerular cell, lads cell and myoepithelial celld)juxtaglomerular cell, macula densa and argentaffin cellCorrect answer is option 'A'. Can you explain this answer?
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Juxtaglomerular apparatus is made up ofa)juxtaglomerular cell, macula densa and lads cellb)juxtaglomerular cell, Purkinje cell and chief cellc)juxtaglomerular cell, lads cell and myoepithelial celld)juxtaglomerular cell, macula densa and argentaffin cellCorrect answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Juxtaglomerular apparatus is made up ofa)juxtaglomerular cell, macula densa and lads cellb)juxtaglomerular cell, Purkinje cell and chief cellc)juxtaglomerular cell, lads cell and myoepithelial celld)juxtaglomerular cell, macula densa and argentaffin cellCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Juxtaglomerular apparatus is made up ofa)juxtaglomerular cell, macula densa and lads cellb)juxtaglomerular cell, Purkinje cell and chief cellc)juxtaglomerular cell, lads cell and myoepithelial celld)juxtaglomerular cell, macula densa and argentaffin cellCorrect answer is option 'A'. Can you explain this answer?.
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