BS111-Lecture 11 - Summary of Lecture Ten Allosteric...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Summary of Lecture Ten Allosteric effects Inhibitors/activators sigmoidal Fluid Mosaic model: protein, lipid, carbohydrates Cell recognition/adhesion: Specificity Cell junctions( stability and communication) Tight Junctions Desmosomes Gap junctions
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 I. Membrane Transport Mechanism Simple Diffusion Facilitated Diffusion Active Transport. What is “Diffusion”?
Background image of page 2
3
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Net movement is directional until equilibrium is reached. Diffusion is net movement from regions of greater concentration to regions of lesser concentration. Diffusion rate depends on: Diameter of the molecules or ions Temperature of the solution Electric charges Concentration gradient
Background image of page 4
5 Diffusion works very well over short distances. 2 2 -1 0 2 The self-diffusion coefficient of H2O in water is 2.26E-5 cm S at 25 How long does it take to travel (using diffusion) 1.0cm? d Dt C = g 2 6.1 2 d t hr D = =
Background image of page 5

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

View Full DocumentRight Arrow Icon
A. Simple Diffusion: Lipid Membranes Small molecules pass through the lipid bilayer. Lipid soluble molecules can diffuse across the
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/29/2008 for the course BS 111 taught by Professor Patterson during the Spring '05 term at Michigan State University.

Page1 / 23

BS111-Lecture 11 - Summary of Lecture Ten Allosteric...

This preview shows document pages 1 - 7. Sign up to view the full document.

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