MCAT Biology Question — Aldosterone
- Jan 28, 2017
- MCAT Question of the Day
A. increasing water permeability of the collecting duct
B. increasing water permeability of the ascending limb of the loop of Henle
C. increasing water permeability in the proximal tubule
D. increasing sodium absorption and potassium secretion in the distal tubule
Click for Explanation
A. increasing water permeability of the collecting duct, incorrect, Antidiuretic Hormone (also known as ADH and vasopressin) causes increased water permeability in the collecting duct.
B. increasing water permeability of the ascending limb of the loop of Henle, incorrect, The ascending limb of the loop of Henle is nearly impermeable to water.
C. increasing water permeability in the proximal tubule, incorrect, Water reabsorption occurs in the descending limb of the loop of Henle, the collecting tubule, and the collecting duct.
D. increasing sodium absorption and potassium secretion in the distal tubule, correct.
Want more MCAT practice?
We’ve got options for every schedule and learning style!
From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!
Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT expert using the form below. No obligation, just expert advice.
Search the Blog
Free ConsultationSchedule Now
MCAT Blog How to Review MCAT Full-Lengths
Free MCAT Practice AccountNeed great MCAT practice?
Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.Learn More