入球小动脉

同时，NO可作为一种抑制性神经递质参与肾入球小动脉活动的调节。

At the same time NO is known to function as an inhibitory neurotransmitter regulating the activity of renal afferent arteriole in rats .

极垫细胞区的微血管主要来自入球小动脉，后者常穿经此区微血管的中央部，但也可呈偏心位。

The microvessels of the area of the polar cushion cell , which mainly originated from the afferent arteriole , were continuous with the capillary of the glomerulus . The afferent arteriole was often traveled in the central part of the area of the polar cushion cell .

结论老年和年轻大鼠的入球和出球小动脉对ANGⅡ有相同的敏感性，而老年大鼠Kf对ANGⅡ更敏感而导致SNGFR的显著下降。

Conclusion The afferent and efferent arteriols had similar sensitivity to exogenous pressor dose of ANG ⅱ in both young and old rats , but K f was more sensitive to ANG ⅱ in old rats leading to significant fall in SNGFR .