Fluid Shifts after Infusions

Question 1

Isotonic (0.9%) NaCl =

_______ ECF volume

_______ in ICF or osmolarity

Answer 1

Isotonic (0.9%) NaCl =

INCREASES ECF volume

NO CHANGE in ICF or osmolarity

Question 2

Pure water (hypotonic fluid) =

_______ both ECF & ICF volume

_______ ECF & ICF osmolarity

Answer 2

Pure water (hypotonic fluid) =

INCREASES both ECF & ICF volume

DECREASES ECF & ICF osmolarity

Question 3

Hypertonic (3%) NaCl =

_______ ECF volume
_______ ICF volume
_______ ECF & ICF osmolarity (dilution)

Answer 3

Hypertonic (3%) NaCl =

INCREASES ECF volume
DECREASES ICF volume
INCREASES ECF & ICF osmolarity (dilution)

Question 4

NaCl is __________ to cell membranes and therefore ________ (can OR cannot) move between compartments, so it stays in the ECF, _______ its volume

Answer 4

IMPERMEABLE

CANNOT

INCREASES

Question 5

ECF osmolarity does not change bc isosmotic means that NaCl has the same osmolarity as ECF

Question 6

Determinates of the Ability