107Diffusion - Dr Potter Biology Dept Diffusion, Osmosis...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Dr Potter Biology Dept Diffusion, Osmosis and Dialysis A basic law of physics is that all molecules are always moving, except at 0 degrees Kelvin (- 273 C or about -460F). The higher the temperature, the faster they move. Diffusion is the passive movement of atoms and molecules down their gradient (just like water always flows downhill). Gradients can be caused by a difference in temperature, pressure aor concentration. In biology, most organisms maintain a constant internal temperature and pressure to concentration gradients are most important (are actually very important). Diffusion can occur in both gases and liquids. Diffusion of the solvent is osmosis and diffusion of solute is dialysis, but both are diffusion. In biology, water is the solvent and everything else (such as glucose, sodium, amino acids, etc) is the solvent. If a substance (solute or solvent) is in a higher concentration (or temp or pressure) in an area of a cell (or beaker), it will go to the area of lower concentration (or temp or pressure) all by itself...
View Full Document

This note was uploaded on 11/04/2011 for the course BI 107 taught by Professor Fuller during the Spring '08 term at Montgomery College.

Page1 / 2

107Diffusion - Dr Potter Biology Dept Diffusion, Osmosis...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online