Biology Help!! Tonicity vs Concentration?

Question

I need to know the difference between Tonicity versus Concentration!! Thank you in advance

Answer 1

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Tonicity is the effective osmolality and is equal to the sum of the concentrations of the solutes which have the capacity to exert an osmotic force across the membrane.

Source(s): http://www.anaesthesiamcq.com/FluidBook/fl2_3.php

Answer 2

tonicity is like osmotic pressure because it is influenced only by solutes that are too big to cross the membrane

concentration refers to each individual type of molecule

[edit] Hypertonicity

Look up hypertonic in Wiktionary, the free dictionary.

A hypertonic solution contains a greater concentration of impermeable solutes than the solution on the other side of the membrane.When a cell’s cytoplasm is bathed in a hypertonic solution the water will be drawn into the solution and out of the cell by osmosis. If water molecules continue to diffuse out of the cell, it will cause the cell to shrink.

[edit] Hypotonicity

A hypotonic solution contains a lesser concentration of impermeable solutes than the solution on the other side of the membrane.When a cell’s cytoplasm is bathed in a hypotonic solution the water will be drawn out of the solution and into the cell by osmosis. If water molecules continue to diffuse into the cell, it will cause the cell to swell.

[edit] Isotonicity

Isotonic solutions contain equal concentrations of impermeable solutes on both sides of the membrane.