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Flashcards in Potassium Deck (25):
1

____ is the primary intracellular cation

potassium

2

the richest dietary source of K is

fruits and veggies

3

potassium absorption occurs in

SI and LI

4

potassium absorption occurs through what mechanism

passive diffusion
active transport via K+/H+ ATPase pump

5

high intracellular potassium concentrations are maintained by

Na+/K+ ATPase pumps

6

Na+/K+ ATPase pumps pump how may sodium ions out, and how many potassium ions in

3 Na out
2 K in

7

functions of potassium

maintenance of membrane potential
intracellular fluid balance

8

Potassium is the principle _______ cation

intracellular

9

Sodium is the principle _______ cation

extracellular

10

the membrane potential is created by

the different concentrations of ions inside and outside the cell

11

the membrane potential is maintained by

Na+/K+ ATPase pumps

12

tight control of cell membrane potential is critical for

nerve impulse transmission
muscle contraction
heart function

13

a substance that dissociated into ions in solution, making it capable of conducting electricity

electolyte

14

potassium is primarily excreted by the

kidneys

15

potassium excretion through the kidneys is controlled by

aldosterone

16

insufficient dietary potassium increased the risk of developing_____

hypertension and kidney stones

17

those with an increased risk of hypokalemia

profound fluid loss (v/d)
use of certain medications (loop/thiazide diuretics)
Mg depletion

18

the Sx of hypokalemia are related to alteration in membrane potential and cellular metabolism and they include:

fatigue
mm weakness, cramps

severe = muscular paralysis and cardiac arrhythmias

19

clinical indications for supplementation of potassium

hypertension

20

higher dietary potassium intakes have _____ blood pressures

lower

21

Potassium toxicity can occur in cases of

renal insufficiency (end stage renal dz)
hypoaldosteronism
medications that cause potassium retention (ie ACE inhibitor)
shift of intracellular potassium into the circulation which my occur with the rupture of RBCs or tissue damage

22

symptoms of hyperkalemia include

peripheral neuropathy
mm weakness
temporary paralysis

23

potassium intake decreases the excretion of

calcium

24

____ is a cofactor for tha Na+/K+ ATPase pump needed for the uptake of potassium from the extracellular fluid into cells

Mg

25

high potassium intake increases ____ excretion and also prevent agains the hypertensive effects of it.

sodium