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Task 1

Regulation of Potassium Ions

Learning Objectives

  • Normal concentration, Line of Defense + Hyper/Hypo Kalemia
  • Factors affecting K+ Distribution
  • Regulation of Renal K+ levels

Task 2

K+ Affects

Task 3

Task 4

Determinants of Renal K+ Excretion

1. Rate of K+ Filtration

2. Rate of K+ Re-absorption from the Tubules

3. Rate of K+ Secretion into the Tubules

Task 5

Secretion through Principal Cells

Task 6

Factors Regulating K+ Secretion

(1) Increased extracellular fluid potassium concentration,

(2) Increased Aldosterone

(3) Increased Tubular Flow Rate

That Increase:

That Decrease:

(1) Increased hydrogen ion concentration (acidosis)

Task 7

Summary

  • Normal K+ range
  • Factors altering K+ distribution
  • Sites of K+ Re-absorption
  • Mechanism of Secretion of K+
  • Factors regulating K+ Secretion
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