Membrane - Membranes All life occurs in on or across membranes 7 9 nm thick Plasma Membrane The plasma membrane is common to all cells Separates

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Membranes Membranes All life occurs in, on or across membranes All life occurs in, on or across membranes 7 - 9 nm thick
Background image of page 1

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

View Full DocumentRight Arrow Icon
Plasma Membrane Plasma Membrane The plasma membrane is common to all cells Separates: ICF from ECF Phospholipid bilayer : External surface lined with hydrophilic polar heads Cytoplasmic surface lined with hydrophilic polar heads Nonpolar, hydrophobic, fatty-acid tails in between
Background image of page 2
Fluid Mosaic Model Fluid Mosaic Model Three components: Basic membrane referred to as phospholipid bilayer Protein molecules - move laterally Cholesterol
Background image of page 3

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

View Full DocumentRight Arrow Icon
Functions of Membrane Proteins Channel Proteins: Carrier Proteins: Cell Recognition Proteins: Receptor Proteins: Enzymatic Proteins: channel carrier Cell recognition receptor enzyme
Background image of page 4
Types of Transport Types of Transport Plasma membrane is differentially (selectively) permeable Passive Transport Active Transport
Background image of page 5

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

View Full DocumentRight Arrow Icon
Types of Membrane Transport Types of Membrane Transport
Background image of page 6
Diffusion Diffusion Solution = Solvent (liquid) + Solute (dissolved solid) Diffusion = Net movement of solute molecules down a concentration gradient Equilibrium :
Background image of page 7

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

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/02/2008 for the course BIOU 111 taught by Professor Pott-santone during the Fall '08 term at Northeastern.

Page1 / 16

Membrane - Membranes All life occurs in on or across membranes 7 9 nm thick Plasma Membrane The plasma membrane is common to all cells Separates

This preview shows document pages 1 - 8. Sign up to view the full document.

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