Biochemistry Online: An Approach Based on Chemical Logic

Biochemistry Online

CHAPTER 6 - TRANSPORT AND KINETICS

A:  PASSIVE AND FACILITATED DIFFUSION

BIOCHEMISTRY - DR. JAKUBOWSKI

Last Update:  04/08/16

Learning Goals/Objectives for Chapter 6A:  After class and this reading, students will be able to

  • define flux (J) of solute (A) across a membrane;
  • write mathematical relationship that show how flux J depends on the concentration gradient of solute across the membrane (dA/dx) and also on the difference of solute concentration across the membrane (ΔA) for passive diffusion;
  • differentiate between passive diffusion, facilitated diffusion mediated by a receptor transporter, and active transport
  • write chemical equations which show the physical steps in the process of passive and facilitated diffusion
  • derive a mathematical equation and graphs which shows the dependencies of flux J as a function of Aout and AR for facilitated diffusion assuming rapid equilibrium binding of ;
  • differentiate between carrier proteins, permeases or transport proteins on one hand and channels on the other;

1. Simple Diffusion

2.  Facilitated Diffusion

3Receptors in Facilitated Diffusion 

4.  Membrane Pores

5.  Cell Junctions - TBA

6Links and References

backNavigation

Return to Biochemistry Online Table of Contents

Archived version of full Chapter 6A:  Passive and Facilitated Diffusion

Creative Commons License
Biochemistry Online by Henry Jakubowski is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.