Movement in and out of cells

Question 1

Diffusion

Answer 1

The random movement of particles from a region of higher concentration to lower concentration down a concentration gradient until both sides are equal.

Question 2

Osmosis

Answer 2

The diffusion of water molecules from a region of lower water potential (concentrated solution) to higher water potential (dilute solution) through a partially permeable membrane.

Question 3

Active transport

Answer 3

The movement of molecules and ions in or out of a cell through the cell membrane against their concentration gradient using energy from respiration.

Question 4

Hypotonic solution

Answer 4

A hypotonic solution is a solution that has a lower solute concentration compared to another solution.

Question 5

Hypertonic solution

Answer 5

A hypertonic solution contains a higher concentration of solutes compared to another solution.

Question 6

Isotonic solutions

Answer 6

contains equal concentrations of impermeable solutes on either side of the membrane, so the sell neither shrinks nor swells.

Question 7

Water potential

Answer 7

The concentration of free water molecules.

Question 8

Plasmolysis

Answer 8

Lost of water in a cell when in a hypertonic solution.

Question 9

Endosmosis and exosmosis

Answer 9

endosmosis is the movement of water into a cell while exosmosis is the movement of water out of a cell.