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co2 in renal vein

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co2 in renal vein

Postby mariposa » Wed Mar 29, 2006 8:02 pm

the blood in renal vein is low in co2 and high in urea? is that correct?

and also im not sure about this urine contains substances underwent pressure filtration ans substances that underwent tubular secretion

is that correct too?,
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Postby Poison » Wed Mar 29, 2006 9:43 pm

Think about it. It is "vein" so...? And it is "renal" which means coming from kidney. Kidney is the place where urea is taken from blood.

The second one looks correct. (please correct me if I'm wrong)
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Postby chepay118 » Fri Mar 31, 2006 11:46 am

Urine production requires three distinct processes:

1.Glomerular filtration occurs at glomerular capsule.
2.Tubular reabsorption, occurs at proximal convoluted tubule.
3.Tubular secretion occurs at distal convoluted tubule.

Glomerular Filtration

1. When blood enters glomerulus, blood pressure moves small molecules from glomerulus across inner
membrane of glomerular capsule into lumen of glomerular capsule; this is pressure filtration.
2. Glomerular walls are 100 times more permeable than walls of most capillaries.
3. Molecules that leave blood and enter glomerular capsules are glomerular filtrate.
4. Plasma proteins and blood cells are too large to be part of glomerular filtrate.
5. Failure to restore fluids would soon cause death from loss of water, nutrients, and low blood pressure.

Tubular Secretion

1. Tubular secretion moves substances in blood back to tubular lumen by other than glomerular filtration.
2. Secretion back into filtrate is primarily associated with distal convoluted tubule.
3. This helps rid body of potentially harmful compounds that were not filtered into glomerular capsule.
4. Uric acid, hydrogen ions, ammonia, and penicillin are eliminated this way.

Does it satisfy you? :D

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