Bubblybabybling
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So if you had to define them what would your definition be? What exactly is their function and why are they so important?
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*pitseleh*
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C'mon dude - Wikipedia would tell you this in about three seconds.

The afferent arteriole is the one that carries blood into the glomerulus, where it gets filtered; efferent carries it out of the glomerulus. The cells lining the afferent arteriole can release renin when they detect low blood pressure, which activates the renin-angiotensin-aldosterone system (RAAS), which ultimately pushes blood pressure back up. The efferent arteriole can constrict, when needed (i.e. in the event of peripheral vasoconstriction), to make sure there's enough pressure in the glomerulus to filter blood adequately.
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Bubblybabybling
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(Original post by *pitseleh*)
C'mon dude - Wikipedia would tell you this in about three seconds.

The afferent arteriole is the one that carries blood into the glomerulus, where it gets filtered; efferent carries it out of the glomerulus. The cells lining the afferent arteriole can release renin when they detect low blood pressure, which activates the renin-angiotensin-aldosterone system (RAAS), which ultimately pushes blood pressure back up. The efferent arteriole can constrict, when needed (i.e. in the event of peripheral vasoconstriction), to make sure there's enough pressure in the glomerulus to filter blood adequately.
Dont trust wiki
Do the afferant branch from renal artery and efferent branch to renal vein?

Tanx
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*pitseleh*
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(Original post by Bubblybabybling)
Dont trust wiki
Do the afferant branch from renal artery and efferent branch to renal vein?

Tanx
Wikipedia is one of the more reliable sources for this kind of thing, believe it or not, because it's so frequently reviewed and amended. I wouldn't cite it if I was writing an essay, but it's more than adequate for this kind of thing. Or there's Medscape if you want something more science-y.

The afferent arterioles don't come directly from the renal artery, and the efferent arterioles don't drain straight into the renal vein; there are a number of other vessels in between. But yes, that is the general direction that things go in.
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Shayhay
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The afferrent arteriole is larger in width, allowing blood to flow at a greater pressure. This is what causes the filtration of the components of the blood and how the glucose/amino acids etc are filtered through the renal capsule.
The efferent arteriole receives this high pressure of blood, and takes it away from the renal capsule, as this would now contain the substances that couldn't be filtered in a normal working kidney eg the proteins, erythrocytes
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Bubblybabybling
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(Original post by Shayhay)
The afferrent arteriole is larger in width, allowing blood to flow at a greater pressure. This is what causes the filtration of the components of the blood and how the glucose/amino acids etc are filtered through the renal capsule.
The efferent arteriole receives this high pressure of blood, and takes it away from the renal capsule, as this would now contain the substances that couldn't be filtered in a normal working kidney eg the proteins, erythrocytes
What I dont understand is, if the afferant atriole is wider then surely the blood would be of low pressure because it has more space to spread out and move?
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Shayhay
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(Original post by Bubblybabybling)
What I dont understand is, if the afferant atriole is wider then surely the blood would be of low pressure because it has more space to spread out and move?
Oh oops, good point I meant it flows at a higher pressure into the efferent one 😅😅 sorry
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