Forces Acting Across Membranes Flashcards
Which one of these ions is high in the ECF?
A)Cl-
B)K+
C)phosphates
B
What is the barrier called between plasma and ISF? And what cannot pass through
Capillary wall, proteins
ECF is 20% plasma, 80% interstitial, true or false
True
How many l is in the ICF
28l
What is the name of the channel carrying water?
Aquaporin
Ions cannot pass freely over the capillary wall? True or false
False
What is the difference between plasma and ISF?
Protein
Transporter proteins can be carrier or _________
Channel
Lack of dystrophin causes what disease ?
Duchennes Muscular dystrophy
Name an example of a communication protein
Glycoproteins
Name the 5 mechanisms of transport in and out of a cell, which one is the odd one out and why
1) diffusion
2) osmosis
3) active
4) filtration
5) exo and endo cytosis
Which method of transport is between plasma and ISF only?
Filtration
What is this defining “opposing the expansion of water experimentally
Osmotic pressure
For every NaCl, how many water molecules is displaced?
2
What is the term given to only the concentration of non-penetrating particles I’m solution?
Tonicity
What is the osmolarity of normal plasma
285/300 mOsmol/l
Osmolarity describes both number and nature of particles? True or false
False
What is tonicity
That is the concentration of only non-penetrating particals
Osmolarity is 285 mosmols/l, what does this mean for the number of particals inside and outside cell
No of particles the same, but composition differs
What is the 285 mosmols/l attributed to
Na and Cl non penetrating ions
Cell placed in hypertonic solution will…..
Shrink
What would result from transfusing pure water
Intravascular haemolysis
What is used to transfuse in patients?
A) hypotonic solution
B) isotonic solution
C) hypertonic solution
B
Why does reducing salt cause reduction in blood pressure
Less salt, results in plasma becoming more hypertonic meaning water will diffuse out of the plasma reducing pressure
Number of water molecules displaced by 1 calcium molecule
3
