Efferent arteriole
Efferent arteriole is a small artery that carries blood away from the glomerulus. After blood has passed through the glomerulus, it is carried away by the efferent arteriole. This is different from the afferent arteriole which carries blood towards the glomerulus. The efferent arteriole plays a crucial role in maintaining the blood pressure within the kidney.
Function
The efferent arteriole carries blood that has been filtered by the glomerulus to the peritubular capillaries and the vasa recta. These are networks of tiny blood vessels that surround the tubules and ducts in the kidney. The efferent arteriole, therefore, plays a crucial role in the process of urine formation.
The efferent arteriole also plays a role in regulating blood pressure within the kidney. It does this by constricting or dilating to adjust the pressure of blood flowing into the peritubular capillaries and the vasa recta.
Clinical significance
Dysfunction of the efferent arteriole can lead to various kidney disorders. For example, constriction of the efferent arteriole can lead to increased pressure in the glomerulus, which can in turn lead to glomerular diseases such as glomerulonephritis and glomerulosclerosis.
See also
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