Efferent arteriole
Efferent Arteriole
The Efferent Arteriole (pronunciation: /ɛfˈɛrənt ɑːrˈtiːriəʊl/) is a small artery that carries blood away from the glomerulus of a nephron in the kidney. The term "efferent" comes from Latin "efferens", meaning "carrying away".
Function
The primary function of the efferent arteriole is to transport blood filtered by the glomerulus to the peritubular capillaries and vasa recta, which are part of the renal tubule system. This process is crucial for the regulation of blood pressure and glomerular filtration rate (GFR).
Structure
The efferent arteriole is smaller in diameter than the afferent arteriole, the vessel that brings blood to the glomerulus. This difference in size creates a pressure gradient that aids in the filtration process.
Clinical Significance
Changes in the diameter of the efferent arteriole can affect kidney function. Constriction of the efferent arteriole, which can occur due to certain medications or health conditions, can increase pressure in the glomerulus and potentially lead to kidney damage.
Related Terms
- Afferent arteriole
- Glomerulus
- Nephron
- Peritubular capillaries
- Vasa recta
- Blood pressure
- Glomerular filtration rate
External links
- Medical encyclopedia article on Efferent arteriole
- Wikipedia's article - Efferent arteriole
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