Tubular reabsorptionQuestion 7Select one:a.Involves the movement of substances from the peritubular capillaries into the tubular fluidb.Occurs only in the proximal tubulec.Involves transepithelial transport that may have a combination of active and passive componentsd.Both involves the movement of substances from the peritubular capillaries into the tubular fluid and occurs only in the proximal tubule are correc
Question
Tubular reabsorptionQuestion 7Select one:a.Involves the movement of substances from the peritubular capillaries into the tubular fluidb.Occurs only in the proximal tubulec.Involves transepithelial transport that may have a combination of active and passive componentsd.Both involves the movement of substances from the peritubular capillaries into the tubular fluid and occurs only in the proximal tubule are correc
Solution
The correct answer is c. Tubular reabsorption involves transepithelial transport that may have a combination of active and passive components.
Here's why:
a. Tubular reabsorption involves the movement of substances from the tubular fluid back into the peritubular capillaries, not the other way around.
b. Tubular reabsorption occurs along all parts of the tubule and collecting duct, not just in the proximal tubule.
c. Tubular reabsorption does involve transepithelial transport, which can be either active (requiring energy) or passive (not requiring energy).
d. As explained above, both statements are incorrect. Tubular reabsorption involves the movement of substances from the tubular fluid into the peritubular capillaries (not the other way around) and occurs in all parts of the tubule and collecting duct (not just the proximal tubule).
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