Read Renal Portal Circulation
A concise NSEB read for renal portal circulation. Learn the key idea, then apply it in the linked practice.
Renal Portal Circulation is the central idea in this question pattern. Identify the condition in the stem before applying the method below.
Core idea
In many lower vertebrates, venous blood from the hind limbs can pass through the kidneys before returning to the central circulation. This is the renal portal system. On a labelled turtle venous diagram, trace the posterior venous route and identify the kidney in that pathway.
Renal Portal System
Identify marked organ in a turtle portal-system image. The lower-vertebrate portal circulation draining the hind limbs is the renal portal system; blood from posterior regions is routed through the kidneys before returning to the central circulation. The marked organ is therefore the kidney.
Apply the route to drug delivery
In reptiles, venous blood from the tail and hind limbs can pass through the kidneys before joining the general circulation, while blood from the front limbs bypasses this renal first pass. The same injected drug can therefore have different circulating concentrations by route. For a nephrotoxic drug, front-limb administration reduces the kidney’s immediate first-pass exposure.
OlympIQ exam lens
- ✓In many lower vertebrates, venous blood from the hind limbs can pass through the kidneys before returning to the central circulation.
- ✓Reptile posterior-body venous return can reach kidney before general circulation.
Use the information in the question and the stated assumptions before choosing an answer.
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