Body fluids

Question 1

What does too little water cause?

Answer 1

-Diarrhoea
-Blood pressure 90/40

Question 2

What does too much water cause?

Answer 2

-Kidney failure
-Blood pressure 200/100

Question 3

Where is ICF located?

Answer 3

Intracellular fluid is located within the cell

Question 4

What is ECF?

Answer 4

Extracellular fluid is any fluid not found within the cell
-Plasma
-Interstitial fluid

Question 5

What is the body fluid distribution?

Answer 5

-60% of body weight is water
-40% of body weight is intracellular water
-20% of body weight is extracellular water

Question 6

What does movement of molecules depend on?

Answer 6

-Depends on pressure
-Depends on the nature of the barrier

Question 7

How does pressure impact molecule movement?

Answer 7

-Ionic pressure
-Osmotic pressure

Question 8

How does nature of barrier impact molecule movements

Answer 8

-Cell membrane
-Capillary wall

Question 9

What are the barriers seperating the compartments?

Answer 9

-Cell and interstitial fluid are separated by cell membrane
-Interstitial fluid and plasma is separated by capillary wall

Question 10

Properties of cell membrane

Answer 10

-Semi permeable
-Allows water only

Question 11

Properties of capillary wall

Answer 11

-More permeable
-Allow water, electrolytes but not protein

Question 12

What drives movement of water in cell membrane?

Answer 12

Osmotic pressure drives
the movement of water

Question 13

What exerts an osmotic pressure in capillary wall barrier?

Answer 13

Only large molecules
(e.g. proteins) can exert
an osmotic pressure
across it

Question 14

What drives movement of water in capillary wall?

Answer 14

Hydrostatic pressure
drives movement of water

Question 15

What is A unit of measurement to describe the
concentration of solute particles?

Answer 15

1 osmole = 1 mole = 6.02x1023 osmotically
active particles

Question 16

What is osmolality?

Answer 16

Osmole/Kg of solvent (water)

Question 17

What is osmolarity?

Answer 17

Osmole/L of solution(changes with temperature)

Question 18

What is tonicity?

Answer 18

The effect of a solution on osmotic movement of water

Question 19

What is Van’t Hoff’s law?

Answer 19

Π = R x T x C

Question 20

What happes in hypertonic solutions

Answer 20

Hypertonic
solution: cells are
crenated

Question 21

What happens in hypotonic solutions?

Answer 21

Hypotonic solution:
cells are swollen

Question 22

What happens in very hypotonic solitions?

Answer 22

Very hypotonic
solution: cells
lysing

Question 23

What does fluid accumulation in the interstium lungs cause?

Answer 23

The fluid accumulation in the interstituim lungs causes shortness of breath

Question 24

What does fluid accumulation in the interstitium of lower limbs cause?

Answer 24

The fluid accumulation in the interstitium of lower limbs causes discomfort. Oedema

Question 25

What are the causes of oedema?

Answer 25

*Increased capillary fluid pressure
*Decreased capillary osmotic press
*Leaky membrane (Coefficient)
*Blocked lymphatics