Water moves out of the descending limb of the LOH because the solute concentration in the
interstitial space is
(higher/ lower) than the solute concentration in the
filtrate.
The ascending limb of the LOH is impermeable to
and permeable to
In this region, NaCl is
(actively/ passively)
transported out, because the concentration of solutes in the interstitial space is
(greater/ smaller) than the concentration of solutes in the filtrate.
When the solutes leave the ascending limb of the LOH, water
(can/cannot) follow. Because of this, the concentration of the filtrate
(increases/ decreases) as it moves up the ascending limb.
The two types of cells present in the collecting duct are the
cells and the
cells, which secrete H+ into the lumen of the collecting ducts.
The principal cells, located in the distal portion of the
tubules and in the
ducts, are sensitive to the hormones
and
(meaning that they have the
for these hormones).
In response to the hormone ADH, the principal cells
(increase/
decrease) their water permeability. This means that more water is
back into the
and less leaves the body as
- ADH is present when the individual is
and needs to
(retain/ excrete) water.
In response to the hormone aldosterone, the principal cells
Na+ reabsorption back into the
and
(increase/ decrease)
decrease) K+ secretion in to the
and
(increase/
