Urine Formation / Formacion de la Orina.

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Category:

Education

Tags:

• medicine

[ansarinho]

i need to pee

but that was great

[rollloric]

Ive been trying to understand this for months..and i have externals next week!! this is a life saver!

[addtism]

cramcramcram :)

[Altairroy]

Respond to this video... 

[Altairroy]

@qwerty112203 ,the thin descending limb is only permeable to water as it has aquaporins.but it is not permeable to salts.

[qwerty112203]

hope i am right =X

[qwerty112203]

4) thus, the tubular fluid at the distal convoluted tubule (impermeable to water) is more dilute, (and further diluted by the secondary active reabsorption of Na+ via Na+Cl- cotransport on the luminal surface and Na+K+ atpase on the basolateral surface). and inner medullary interstitum is concentrated.

5) the collecting ducts are permeable to water when aquaporins are opened by ADH. water will flow through these channels and is reabsorbed down a concentration gradient.

[qwerty112203]

2) since cells on the thin descending limb are permeable to water and salt, water leaves and salt enters the tubular fluid by diffusion, equilibrating with the interstitial fluid.

3) the tubular fluid in 1st part of the loop is now more concentrated (as is the interstitium). this fluid now flows to the thick ascending loop where the cycle repeats, multiplying the concentrating effect it has on the interstitium and the thin ascending limb.

[qwerty112203]

1) at the thick ascending limb of the loop of henle, cells are impermeable to water. Na+K+2Cl- pumps are present on the luminal surface of the epithelial cells. This cotransports Na+, K+ and Cl- from the lumen into the cell. At the basolateral membrane, Na+ is transported out of the cell by Na+K+ atpase, K+ and Cl- diffuse out. Thus, medullary interstitium is concentrated and tubular fluid is diluted.

[dippidop]

@dreadfulblood

Fraps it?.. fraps dot com

[kelloggcerealxoxo]

i still don't understand

[dreadfulblood]

how will i donwload this video?