Biology 449 - Animal Physiology September 3, 2008

Lecture 3 - Diffusion & Osmosis

Passive movement of solutes and water

Diffusion

Concentration gradients

Fick's equation

Electrochemical gradients

Osmosis

Osmolarity

Osmotic pressure

Tonicity

 

Terms to Know

Diffusion
Molarity
Fick's Equation
Electrochemical gradient
Donnan equilibrium

 

 

Osmosis
Osmolarity
Hyperosmotic
Hyposmotic
Isosmotic

Osmotic Pressure (Π)
Hydrostatic Pressure (P)

Hypotonic
Hypertonic
Isotonic

 

Readings

Lecture 3: Chapter 3, pages 68-85
Lecture 4: Chapter 5, pages 140-165