N212 Lecture 13 Flashcards
fluid, electrolyte and acid base balances in the body maintain the health and function of all body systems, true or false
true
extracellular fluid (ECF) is outside of the cell and is 1/3 of total body water
intracellular fluid (ICF) is inside cells and is 2/3 of total body water
ECF has 2 major divisions, intravascular (liquid part of blood plasma) and interstitial fluid ( between cells and outside the blood vessels) and minor division transcellular fluids (cerebrospinal, pleural, peritoneal and synovial fluids)
osmolality of fluid is a measure of the number of particles per kg of water
Na does not pass easily through the cell membrane
isotonic fluid is a fluid with the same tonicity
hypotonic solution is more dilute than blood
hypertonic solution is more concentrated than normal blood
fluid homeostasis is the dynamic interplay of 3 processes: fluid intake and absorption, fluid distribution and fluid output
normal daily fluid output is hypotonic salt ( urine, salt)solution, people must have equivalent fluid intake of hypotonic sodium containing fluid( water plus food with some salt)
average fluid intake for adult is 2300mL
Thirst is a regulator of fluid intake when plasma osmolality increases
thirst control mechanism located within the hypothalamus
fluid output occurs in 4 organs, skin lungs, GI tract and kidneys
hormonal influences for fluid balance are antidiuretic hormone, renin angiotensin aldosterone mechanism and atrial natriurectic peptides
Na lab value
135-145
potassium
3.5-5
Bun
5-20
creatinine
0.6-1.2
glucose
70-100
chloride
95-105
magnesium
1.5-2.5
phosphorus
2.5-4.5
calcium
9-11
hgb
13-18m, 12-16f
hct
39-54m, 36-48f
wbc
4000-11000