Sodium revision - week 11 Flashcards
1
Q
Food source
A
- table salt
- processed foods
- condiments
- sauces
- soups
- chips
2
Q
Absorption
A
in SI and LI - 98% efficiency
3
Q
Transport
A
sodium-potassium pump
- active transport
4
Q
excretion
A
- Majority is excreted in urine, unless excessive sweating
- Some lost in faeces
- Amount excreted varies by ethnicity
- Conservation by reducing urine output
5
Q
main functinos
A
- Major positive ion of the extracellular fluid
- aids nerve impulse transmission and muscle contraction,
- water balance
- aids glucose and amino acid absorption
6
Q
AI
A
460-920mg
7
Q
UL
A
undetermined (used to be 2300mg)
8
Q
toxicity
A
- hypernatremia
- hypertension in susceptible individuals
- increase calcium loss in urine
9
Q
deficiency
A
- hyponatremia - muscle cramps, heaadaches, nausea, vomiting, fatigue
