loop of henle

the loop of henle

this structure allows for concentrated urine at the collecting duct, so we need to remove water in the collecting duct, so we need a high concentration of soluted in tissues surrounding (role of the henle is too create a gradient)

difference betwen the descending and the ascending part of the henle

the ascending section is thicker than the descending

what happens at the thick asceneding part

sodium and chloride ions actively pumped out, increasing the concentration ofnsolute in the surrounding tissue, so decreasing the water potential, so as the filtrate goes down the descending loop, water will be lost

the bottom part of the loop of henle

is impermeable to eveyrthin, so very concentrated filtrate,

the descending part of the loop of henle

permeable to water but not to sodum

permeable meaning

capable of being passed through

what also happens at the lower part of the ascending loop

na+ and cl- passively diffuses because it is very concentrated

what permeability is the ascending part of the loop

impermeable to water, so the water doesnt follow