Cell Membranes

CELL MEMBRANES and TRANSPORT dr shabeel pn

Learning Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Key words you should know ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cell membrane ,[object Object],[object Object],[object Object],[object Object],[object Object]

Cell Membranes from Opposing Neurons (TEM x436,740). } cell membrane 7nm wide Cell membrane { Nerve cell Nerve cell Gap between cells

[object Object],[object Object],[object Object],[object Object],Cell membranes are made of PHOSPHOLIPIDs A Phospholipid

Phospholipids are important structural components of cell membranes. Phospholipids are modified so that a phosphate group (PO4-) replaces one of the three fatty acids normally found on a lipid. The addition of this group makes a polar "head" and two nonpolar "tails".

A phospholipid ,[object Object],[object Object],[object Object],[object Object],3D model of a Phospholipid

A Phospholipid Bilayer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Structure of the cell membrane ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Diagram representing the cell membrane Remember the membrane is 7nm wide

Fluid mosaic model ,[object Object],[object Object],[object Object],[object Object],[object Object]

TEM of freeze-fractured cell membrane . ,[object Object],[object Object],[object Object]

Cell Membranes from Opposing Neurons (TEM x436,740). } Phospholipid Bilayer 7nm wide

Features of the fluid mosaic model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Roles of components of cell membranes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Movement of selected molecules across the cell membrane

Cell Membranes

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Cell Membranes