What is the role of efferent and afferent arteriole and glomerular filtration?
Answers
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Afferent artiriole is more broader than efferent arteriole . Blood flows renal artery to glomerulus through afferent arteriole. This influence of pressure due to the narrowness of afferent arteriole . As a result it under goes pressure filtration or ultra filtration.
Efferent arteriole is forms like a long peritubular capillaries which surrounds the PCT ( proximal convoluted tuble ) and DCT ( distal convoluted tuble) . Here reabsorbtion takes placi but not in afferent arteriole.
Afferent arteriole gives only oxygenatedblood which is loaded with waste marterials. But efferent arteriolr send deoxygenated blood to renal vien .
Hence , afferent and afferent arteriole has a major differences.
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Answer:
The afferent and efferent arterioles constrict in response to α-adrenergic stimulation. This vasoconstriction predominantly affects the afferent arteriole, effectively reducing hydrostatic pressure within the glomerular capillary lumen and decreasing glomerular filtration.