Home › NCK Licensing Exam (Nursing) › Anatomy & Physiology › Kidney Anatomy › Why does the nephron's blood supply qualify as a…
Why does the nephron's blood supply qualify as a portal system?
AIts veins drain straight to the liver
BOne capillary bed feeds a second through a vessel
CIt contains no arterioles at any point
DIt bypasses the heart circulation entirely
Answer & Solution
Correct answer: B. One capillary bed feeds a second through a vessel
1. A portal system is defined by two capillary beds in series.
2. Here the glomerulus drains into a vessel that in turn forms the peritubular capillaries and vasa recta.
3. It is the only portal system with an arteriole between the two beds.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section Nephrons and Vessels_
Related questions
After the renal corpuscle, the capillaries form which vessel next?Finding excessive protein in the urine usually points to what?Why are blood cells and albumin normally absent from the filtrate?About how much filtrate do the glomeruli create every day, and how much leaves as urine?Which structures carry urine made by nephrons to the calyces for excretion?A frontal section of the kidney shows an outer and an inner region. What are they called?The glomerulus together with Bowman's capsule forms which structure?Roughly how many nephrons do the afferent arterioles serve in each kidney?