fluid compartments

Question 1

main fluid compartments and relative % composition

Answer 1

intracellular (55%), extracellular (45%)

Question 2

divisions of extracellular and relative % composition

Answer 2

interstitial fluid (36%), plasma (7%), transcellular fluid (2%)

Question 3

what does transcellular fluid include

Answer 3

ocular fluid, cerebrospinal fluid, synovial fluid

Question 4

how is extracellular fluid compartmentalised

Answer 4

plasma membrane, epithelial cells, endothelium in blood vessels

Question 5

where is interstitial fluid

Answer 5

basal extracellular; bathes cells withing tissues

Question 6

plasma vs intersitital fluid: protein

Answer 6

plasma contains more protein than interstitial fluid

Question 7

extracellular plasma vs intracellular muscle: cations

Answer 7

Na+ higher in plasma, K+ higher in intracellular muscle, Ca2+ much higher in plasma (steep gradient as signalling cation)

Question 8

extracellular plasma vs intracellular muscle: anions

Answer 8

Cl- higher in plasma, phosphates and protein higher in intracellular muscle

Question 9

extracellular plasma vs intracellular muscle: pH

Answer 9

pH greater in plasma (so lower [H+] in plasma)