alleryStart learning →What fraction of the plasma passing through the glomerulus is actually filtered into Bowman's capsule?
AAbout 1 to 2 percent
BAbout 50 to 60 percent
CAbout 10 to 20 percent
DAbout 30 to 40 percent
Answer & Solution
Correct answer: C. About 10 to 20 percent
1. Blood entering the glomerulus does not all become filtrate; most of it leaves by the efferent arteriole.
2. Between 10 and 20 percent of the plasma crosses the filtration slits into the capsule.
3. The rest carries the cells and plasma proteins onward to the peritubular capillaries.
4. If half the plasma were filtered at one pass, the blood leaving the glomerulus would be far too concentrated to flow.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.4 Microscopic Anatomy of the Kidney_
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