Answer the following multiple-choice questions by selecting each appropriate answer:
1. Diffusion is:
The movement of a substance from an area of high, to an area of low concentration The movement of a substance from an area of low to an area of high concentration The movement of a substance in any direction
2. Osmosis can be described as:
The movement of water through a semi-permeable membrane from an area of more, to an area of less water The movement of liquid from an area of high concentration to an area of low concentration The movement of a solution through a semi-permeable membrane into an area of lower concentration
3. A concentration gradient is:
A relationship between two areas with differing concentrations of a particular substance A movement between two substances Movement of a substance from an area of high concentration to an area of low concentration
4. A hypotonic solution is one that:
Contains only fluids Contains less water than anything else Contains more water than anything else