Forces Acting Across Membranes

Question 1

Which one of these ions is high in the ECF?
A)Cl-
B)K+
C)phosphates

Answer 1

B

Question 2

What is the barrier called between plasma and ISF? And what cannot pass through

Answer 2

Capillary wall, proteins

Question 3

ECF is 20% plasma, 80% interstitial, true or false

Answer 3

True

Question 4

How many l is in the ICF

Answer 4

28l

Question 5

What is the name of the channel carrying water?

Answer 5

Aquaporin

Question 6

Ions cannot pass freely over the capillary wall? True or false

Answer 6

False

Question 7

What is the difference between plasma and ISF?

Answer 7

Protein

Question 8

Transporter proteins can be carrier or _________

Answer 8

Channel

Question 9

Lack of dystrophin causes what disease ?

Answer 9

Duchennes Muscular dystrophy

Question 10

Name an example of a communication protein

Answer 10

Glycoproteins

Question 11

Name the 5 mechanisms of transport in and out of a cell, which one is the odd one out and why

Answer 11

1) diffusion
2) osmosis
3) active
4) filtration
5) exo and endo cytosis

Question 12

Which method of transport is between plasma and ISF only?

Answer 12

Filtration

Question 13

What is this defining “opposing the expansion of water experimentally

Answer 13

Osmotic pressure

Question 14

For every NaCl, how many water molecules is displaced?

Answer 14

2

Question 15

What is the term given to only the concentration of non-penetrating particles I’m solution?

Answer 15

Tonicity

Question 16

What is the osmolarity of normal plasma

Answer 16

285/300 mOsmol/l

Question 17

Osmolarity describes both number and nature of particles? True or false

Answer 17

False

Question 18

What is tonicity

Answer 18

That is the concentration of only non-penetrating particals

Question 19

Osmolarity is 285 mosmols/l, what does this mean for the number of particals inside and outside cell

Answer 19

No of particles the same, but composition differs

Question 20

What is the 285 mosmols/l attributed to

Answer 20

Na and Cl non penetrating ions

Question 21

Cell placed in hypertonic solution will…..

Answer 21

Shrink

Question 22

What would result from transfusing pure water

Answer 22

Intravascular haemolysis

Question 23

What is used to transfuse in patients?
A) hypotonic solution
B) isotonic solution
C) hypertonic solution

Answer 23

B

Question 24

Why does reducing salt cause reduction in blood pressure

Answer 24

Less salt, results in plasma becoming more hypertonic meaning water will diffuse out of the plasma reducing pressure

Question 25

Number of water molecules displaced by 1 calcium molecule

Answer 25

3