Review of Potassium Metabolism
Über den Vortrag
Der Vortrag „Review of Potassium Metabolism“ von Amy Sussman, MD ist Bestandteil des Kurses „Year 4 – Selective Sub-Internship“.
Quiz zum Vortrag
Which of the following enables the cells in the thick ascending limb to absorb sodium efficiently?
- Potassium recycling
- Increased aquaporin expression
- Inhibition of Na/K ATPase
- Increased epithelial sodium channel (ENaC) sensitivity
Most of the filtered potassium is absorbed in...?
- ...the proximal convoluted tubule.
- ...the thick ascending limb of the loop of Henle.
- ...the principal cells in the collecting duct.
- ...the intercalated cells in the collecting duct.
Which of the following provides the driving force for the active transport of potassium ions?
- Sodium-potassium ATPase
- Na-K-Cl cotransporter (NKCC)
- Renal outer medullary potassium channel
- Hydrogen-potassium ATPase
- Epithelial sodium channel (ENaC)
Which of the following decreases potassium excretion?
- Decreased urine flow rate
- Increased aldosterone release
- Decreased sodium plasma concentration
- Increased distal sodium delivery
- Increased Na/K ATPase activity
What is the mechanism of thiazide-induced hypokalemia?
- Increased distal sodium delivery
- Decreased activity of Na-K-2Cl channels
- Increased activity of Na-Cl cotransporter in the distal tubule
- Decreased urine flow rate
Which of the following is true?
- Severe hypokalemia increases the activity of hydrogen-potassium ATPase.
- Paracellular potassium reabsorption at the proximal tubule is against the electrochemical gradient.
- Aldosterone decreases the activity of luminal potassium channels.
- Of total body potassium, 98% is in the ECF.
- Loop diuretics cause hyperkalemia by increasing the urine flow rate.
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Dozent des Vortrages Review of Potassium Metabolism
Amy Sussman, MD
Dr. Amy Sussman is an Associate Professor of Medicine and the Vice Chair of Education in the Department of Medicine of the University of Arizona (UA), USA.
She obtained her MD from the University of Arizona in 2001 and completed residency and a Nephrology Fellowship at the University of Washington. Dr. Sussman was recruited back to the UA in 2009 and also serves as her department's clerkship director, and as the program director of the UA Nephrology Fellowship.
Because of her strong emphasis on medical student teaching, she has been distinguished with multiple teaching awards in the UA College of Medicine.
Within Lecturio, Dr. Sussman teaches courses on Nephrology.
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