Osmosis

How does osmosis occur?

By definition, osmosis is the diffusion of water through a selectively permeable membrane from an area of high water potential (low solute concentration) to and area of low water potential (high solute concentration).

What is osmolarity?

Comparing solution to cell WHEN NOT MIXING THEM

(Talking about tonicity) What will enter the cell?

Dextrose will Saline(Na+) will not

Why do we need a selectively permeable membrane for osmosis to occur?

For osmosis to occur the membrane must be permeable to water but impermeable to the solute and the concentration of the solute must be different on the two sides of the membrane.

What is hypotonic?

If the cell swells, we say that the solution was hypotonic.

What is the difference between osmolarity and tonicity?

Osmolarity doesn't take into account the nature of the solutes while tonicity is dependent upon the concentration of the nonpermeable solutes.

What is osmotic pressure?

The pressure that is just sufficient to prevent water from moving across the membrane is referred to as osmotic pressure.

What is a solute?

The substance being dissolved in a solution.

What is tonicity?

This is a word used to describe how a solution affects a cell when the cell is placed in it. Whether it swells, shrinks, or stays the same. This is when the cell and extracellular fluid are mixed.

What is hyposmotic?

This means that one solution is less concentrated than the other.

What is hyperosmotic?

This means that one solution is more concentrated than the other.

What is isosmotic?

This means that two solutions have the same number of particles.

What is hypertonic?

if the cell shrinks (crenates) we say the solution was hypertonic.

What is isotonic?

isotonic solutions have the same concentration of osmotically active particles (osmotically active particles are non-permeable particles) as are found in the cell.