Page 1 of 1: tubular maximum of a kidney......

manipalguy · Credits: 15905 My Scrapbook

tubular maximum for kidney in practice is actually less than the calculated value because..
1.defferent nephrons have different lengths
2.depends on gfr
3.depends on renal blood flow
4.depends on blood pressure.

kindly explain with references and whats the funda of tubular maximum???

RxPG_Team · Credits: 19656091 My Scrapbook My Reading List 5 Books

Tubular Maximum

Tubular maximum

Maximum rate at which a substance can be actively absorbed

Each substance has its own tubular maximum

RxPG_Team · Credits: 19656091 My Scrapbook My Reading List 5 Books

The amount of a substance that's reabsorbed or secreted depends on the substance's maximum tubular transport capacity - the maximum amount of a substance that can be reabsorbed or secreted in a minute without saturating the renal system.

For example, in diabetes mellitus, excess glucose in the blood overwhelms the renal tubules and causes glucose to appear in the urine (glycosuria). In other cases, when glomeruli are damaged, protein appears in the urine (proteinuria) because the large protein molecules pass into the urine instead of being reabsorbed.

manipalguy · Credits: 15905 My Scrapbook

so what will be the answer for the above question???

myself · Credits: 628 My Scrapbook

I GUESS ITS BECAUSE DIFFERENT NEPHRONS HAVE DIFFERENT LENGTH

IN CASE OF SHORT NEPHRON Tm WILL BE LESS.........AND VISA- VERSA

STILL U CHECK OUT WITH SOMEONE ELSE BECAUSE EVEN I AM NOT 100% SURE

myself · Credits: 628 My Scrapbook

I GUESS ITS BECAUSE DIFFERENT NEPHRONS HAVE DIFFERENT LENGTH

IN CASE OF SHORT NEPHRON Tm WILL BE LESS.........AND VISA- VERSA

STILL U CHECK OUT WITH SOMEONE ELSE BECAUSE EVEN I AM NOT 100% SURE

tallpox · Credits: 12032 My Scrapbook

gfr makes more sense, as both renal blood flow and pressures affect it. it obviosly varies throughout the kidney.

lengths doesnt explain too much because large parts of a nepron cant absorb glucose. so increase lenghts may not transcend to differing absorbtive capacity.

manipalguy · Credits: 15905 My Scrapbook

but salgu says the answer is ... "a"

suneet · Credits: 6820 My Scrapbook

yep the ans given is a

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