Chapter 1.7 Osmosis Flashcards
What is the definition of osmosis?
Osmosis is the diffusion of water molecules from a dilute solution (high concentration of water) to a more concentrated solution (low concentration of water) across a selectively permeable membrane.
What does a dilute solution of sugar contain?
A dilute solution of sugar contains a high concentration of water (the solvent). It has low concentration of sugar (the solute).
What does a concentrated sugar solution contain?
A concentrated sugar solution contains a relatively low concentration of water and a high concentration of sugar.
What is the difference between osmosis and diffusion?
Osmosis - Osmosis is the diffusion of water molecules from a dilute solution (high concentration of water) to a more concentrated solution (low concentration of water) across a selectively permeable membrane.
Diffusion - Diffusion is the net passive movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration.
What type of solution is it if the concentration in the solution outside the cell is the same as the internal concentration?
The solution is isotonic to the cell.
What is the definition of an isotonic soultion?
An isotonic solution refers to two solutions having the same osmotic pressure across a semipermeable membrane.
What type of type of solution is it if the concentration of solutes in the solution outside the cell is higher than the internal conditions?
The solution is hypertonic to the cell.
What is the definition of a hypertonic solution?
A hypertonic solution is one in which there is a greater concentration or number of solute particles outside a membrane than there are inside it.
What type of solution is it if the concentration of solutes in the solution outside of the cell is lower than the internal concentration?
The solution is hypotonic.
What is the definition of a hypotonic solution?
A hypotonic solution is any solution that has a lower osmotic pressure than another solution.
