Physiological fluids

Question 1

Examples of physiological fluids

Answer 1

Intracellular and extracellular fluid

Question 2

Molar solution

Answer 2

Molecular weight of a substance in grams dissolved in 1 litre of water (1M)

Question 3

Millimolar solution

Answer 3

Molecular weight of a substance in milligrams dissolved in 1 litre of water (1mM)

Question 4

Extracellular fluid

Answer 4

Weak solutions of common salts in water (sodium chloride)

Question 5

Intracellular fluid

Answer 5

Weak solutions of potassium chloride in water

Question 6

Composition of water in the body

Answer 6

67% in cells
26% in tissue fluid
7% in blood plasma

Question 7

Movement across capillary walls

Answer 7

Cell membrane is semi-permeable so water can move between compartments via osmosis. It also allows cations and anions to move through however proteins cannot.

Question 8

Fluid maintenance

Answer 8

Water enters the body via the gut which is transferred to the plasma and sent around the body