Master Collecting Duct with Picmonic for Pre-Health

With Picmonic, facts become pictures. We've taken what the science shows - image mnemonics work - but we've boosted the effectiveness by building and associating memorable characters, interesting audio stories, and built-in quizzing.

Collecting Duct

Collection Duck
Picmonic
The collecting duct system is a set of tubules and ducts that lead from the nephron to the ureter for urine excretion. One function of the collecting ducts is the absorption of sodium using active transport, specifically sodium-potassium ATPase pumps. At the expense of ATP, sodium is pumped back in the principal cells of the collecting duct and potassium is pumped out. This process is regulated by aldosterone, which stimulates the synthesis of more pumps.Vasopressin also acts on these cells, increasing the water reabsorption by upregulating aquaporin channels, allowing osmosis to occur coupled with sodium reabsorption. Finally, the collecting duct concentrates urine by reabsorbing necessary salts and water, reducing the volume, and increasing the concentration of urine output.
3 KEY FACTS
CHARACTERISTICS
Na+ Reabsorption via Passive Transport
Salt-shaker Slipping Through

Aldosterone causes an upregulation in the Na/K ATPase in the principal cells of the collecting duct. This pumps Na out of the cell towards the bloodstream, and K into the cell. The exit of Na creates a gradient that passively draws Na from within the collecting duct lumen into the cell, and then into the bloodstream. Epithelial sodium channels (ENaC) on the lumenal surface allow this passive movement of Na from the lumen down the gradient into the cell. Aldosterone upregulates ENaC production as well.

Vasopressin Causes Water reabsorption
Vase-presents pressing Water onto Sponge

Vasopressin, also called ADH, or antidiuretic hormone, affects the expression of aquaporin channels on the surface of principal cells, which control the amount of water reabsorbed osmotically.

Concentrates Filtrate
Concentrated-drop dripping into Filter-jar

The collecting duct helps concentrate urine by reabsorbing important electrolytes and water, thus concentrating the urine as it goes to the ureter.

Unlock all 3 facts & definitions with Picmonic Free!

JOIN FREE

Take the Collecting Duct Quiz

Picmonic's rapid review multiple-choice quiz allows you to assess your knowledge.

START QUIZ NOW

It's worth every penny

Picmonic for Pre-Health Covers

Pre-Health
100+ Videos
1000+ Facts

*Average video play time: 2-3 minutes

Loading
Search for a specific Video or category now!
Or create your own Picmonic

Our Story Mnemonics Increase Mastery and Retention

Memorize facts with phonetic mnemonics

Unforgettable characters with concise but impactful videos (2-4 min each)

Ace Your Pre-Health Classes & Exams with Picmonic:

Over 870,000 students use Picmonic’s picture mnemonics to improve knowledge, retention, and exam performance.

Choose the #1 Pre-Health student study app.

Picmonic for Pre-Health covers information that is relevant to your entire Pre-Health education. Whether you’re studying for your classes or getting ready to conquer the MCAT, we’re here to help.

Works better than traditional Pre-Health flashcards.

Research shows that students who use Picmonic see a 331% improvement in memory retention and a 50% improvement in test scores.