Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
What % of cations in the body does sodium represent?
|
93%
*most abundant |
|
|
What type of cellular cation is sodium
|
extracellular
|
|
|
what are sources of Na
|
major source is SALT (NaCl)
also alot in processed foods * about 75% of total Na consumed from these |
|
|
What is the absorption efficiency of Na?
|
95-100%
|
|
|
What is sodium commonly cotransported with into the enterocyte?
|
glucose
|
|
|
how is Na transported in the blood?
|
free
|
|
|
what is the serum concentration range that sodium is narrowly controlled at?
|
135-145 mEq/L
|
|
|
"where Na goes, ______ goes"
|
water
|
|
|
what are the main function of sodium?
|
fluid balance ( osmotic pressure)
nerve transmission / impulse conduction muscle contraction |
|
|
What charge is outside the cell?
|
positive
*3 na pumped out for every 2 K pumped in |
|
|
Sodium increases kidney excretion of what?
|
calcium
|
|
|
what increases excretion of na? ( preserving ca)
|
potassium
|
|
|
how is sodium excreted?
|
mainly urine, sweat
|
|
|
When can sodium deficiency (rare) occur?
|
excessive sweating
vomiting and diarrhea |
|
|
What is the UL ?
|
2300 mg
|
|
|
how is sodium assessed?
|
ion-selective electrode potentiometry
|
|
|
what is the common intake of sodium?
|
3-5 grams - double the UL!
|
|
|
how does the body move fluids?
|
by moving electrolytes
|
|
|
Serum Na levels are a monitor of what?
|
hydration status
|
|
|
What do the kidneys do when the body is dehydrated?
|
resorb more water
|
|
|
what can happen is dehydration becomes severe?
|
thirst.
delirium death |
|
|
When do the kidneys reabsord less water
|
during water intoxication
* high serum na pulls fluid from intracellular reserves |
