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Juxtaglomerular Apparatus MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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6 Questions around this concept.
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MEDIUMJuxtaglomerular apparatus is formed by
The function of macula densa is
JGA is the sensitive region between
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Which of the following activates the JG cells to release renin?
An increase in blood flow to atria of heart can cause the release of
Concepts Covered - 1
Juxtaglomerular Apparatus
- It is located just adjacent to the vascular pole of the renal corpuscle.
- The DCT comes in direct contact of the afferent and efferent arteriole and that region of the DCT forms the macula densa.
- Macula densa is a cluster of cuboidal epithelial cells that monitors the composition of the fluid that flows through the DCT.
- They respond to the concentration of Na+ in the fluid and release the paracrine signals in the form of ATP and adenosine.
- A second cell type in this apparatus is the juxtaglomerular cell.
- This is a modified, smooth muscle cell lining the afferent arteriole that can contract or relax in response to ATP or adenosine released by the macula densa.
- A second function of the macula densa cells is to regulate renin release from the juxtaglomerular cells of the afferent arteriole.
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