Juxta glomerular cell structure
Biology
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The juxtaglomerular cells (also called granular cells) are specialized cells that form part of the juxtaglomerular apparatus.
Their structure is characterized by:
- Location: They are found in the walls of the afferent arterioles, which are the small arteries that carry blood to the glomerulus (the filtering unit) in the kidney.
- Appearance: They are modified smooth muscle cells.
- Granules: The most distinctive feature is the presence of numerous granules within their cytoplasm. These granules contain the hormone renin, which is released when needed.
- Nucleus: They have a large, often centrally located nucleus.
- Smooth Muscle: Because they are modified smooth muscle cells, they have the ability to contract and relax, which can help regulate blood flow into the glomerulus.
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