Potassium revision- week 11 Flashcards
1
Q
Food source
A
- many fruit and vege, milk and milk products, meat legumes, whole grains
2
Q
Absorption
A
- 90% absorbed
- in SI and Li
- passive diffusion or Na-K-ATPase pump active absorption
3
Q
Storage
A
- 95% stored inside cells (K+)
- uptake via active transport
4
Q
Excretion
A
- via urine
- some excreted via faece and sweat
- aldosterone is responsible for excretion of potassium via the kidney
5
Q
Main function
A
- major positive ion of intracellular fluid
- aids nerve impulse transmission and muscle contraction
- water balance
6
Q
AI
A
men - 3800mg
women - 2800mg
7
Q
UL
A
none
8
Q
Toxicity
A
- Hyperkalemia
- Slowing of heartbeat (seen in kidney failure)
9
Q
Deficiency
A
- Hypokalemia
- Irregular heart beat
- Loss of appetite
- Muscle cramps
- Increase risk of hypertension and stroke
