- Because the membrane of the glomerulus should not permit proteins
to cross. If there is protein present in the urine, this
indicates that the glomerular membrane is not functioning correctly.
- When the body has too many ions, so that the concentrations are
too high, the body will secrete ADH to retain water and help dilute
the ions. If the body has too much water, and not enough ions,
it can use aldosterone to regain Na+ ions (at the expense
of K+ ions).
- Because by dilating this vessel, more blood can enter the
glomerulus to be filtered.
- ADH makes the collecting tubule permeable to water, which will
allow water to flow out (presuming an appropriate concentration
gradient is present).
- The interlobar blood vessels are found between the renal columns
in the medulla, while the interlobular vessels are found in the
cortex, where they supply the cortical nephrons with an appropriate
blood supply.
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