Topic 1: 4

Question 1

permeability

Answer 1

measure of the ease with which a substrate can penetrate a membrane

Question 2

osmosis driven by

Answer 2

osmolarity of solutions

Question 3

osmotic pressure

Answer 3

tendency for water to move down its gradient

Question 4

osmolarity

Answer 4

depends on number of ALL solute particles in solution (including dissociated substances)
Osmolarity= concentration (mM/M) x no. of particles (expressed in mOsm/Osm)

Question 5

hypo osmsotic

Answer 5

solution with lower number of particles per litre of solution than another
exerts a higher pressure than the other solution for water to move

Question 6

hyper osmotic

Answer 6

solution with a higher number of particles per litre of solution than another
exerts a lower pressure than the other solution for water to move

Question 7

iso osmotic

Answer 7

two solutions have the same number of particles per litre of solution
exert the same pressure on water to move

Question 8

RBC osmotic pressure

Answer 8

280 mOsm

Question 9

Tonicity

Answer 9

explains fate of a cell

NPP only

Question 10

Saline

Answer 10

150mM NaCl is iso osmotic and isotonic to the RBC so it is known as 100% physiological saline