Communication + homeostasis

Question 1

Describe total body water % and the constituents in a 70kg male

Answer 1

60%=water =42L
ECF= 14/42 ((Intravascular= 3
Extra vascular = 11))

ICF=28/42

Question 2

ICF and ECF are always

a) hypertonic
b)isotonic

Answer 2

b

Question 3

what force pulls fluid from one compartment to another

Answer 3

osmotic(colloid) pressure

Question 4

what ion is the main contrubter in ECF osmolarity and at what mol/L

Answer 4

Na+ 135

Question 5

what ion is the main contrubter in ICF osmolarity and at what mol/l

Answer 5

K+ 4

Question 6

Define osmolarity

Answer 6

concentration of solutes in plasma per kg of solution

Question 7

Define osmolality

Answer 7

concentration of solutes in plasma per kg of solvent

Question 8

Define osmotic pressure

Answer 8

pressure applied to a solution, by a pure solvent, required to prevent inward osmosis, through a semipermeable membrane.

Question 9

define oncotic pressure

Answer 9

form of osmotic pressure exerted by protein that tends to pull fluid into its solution – water moves from ISF into plasma.

Question 10

define hydrostatic pressure

Answer 10

pressure difference between capillary blood (plasma) and interstitial fluid – water and solutes move from plasma into ISF