Section 1 Transport of ions and Molecules through the Cel Membrane
7 Section 1 Transport of Ions and Molecules through the Cell Membrane
I Review Structure of the cell membrane
8 I Review Structure of the Cell Membrane
What do membranes do? Act as a barrier and Membranes are active Receive information Dynamic Import/export molecules Move/expand receivint information 3 capacity for movement and expansion 2 import and export of molecules
9 What do membranes do? ➢ Act as a barrier AND… ➢ Receive information ➢ Import/export molecules ➢ Move/expand Membranes are Active Dynamic !
The cell Membrane system asma internal membrane molecules membrane enclosing enclosing an outside cell cell endoplasmic lysosome compartmentreticulum molecules molecules 。。0 intracellula ●。 ●● compartment (A) (B) >Membranes surrounding the cell mitochondrion membrane >Membrane systems inside the cell The nucleus, endoplasmic reticulum, golgi apparatus, Endosome(内小体) and lysosomes form the endomembrane system
10 The Cell Membrane System ➢Membranes surrounding the cell ➢Membrane systems inside the cell ➢The nucleus, endoplasmic reticulum, golgi apparatus, Endosomes (内小体）and lysosomes form the endomembrane system
Composition of the cell membrane Protein 55% Phospholipids 25% lipid bila Cholesterol 13% (5nm) Other lipids 4% Carbohydrates 3% ipid molecule protein molecule
11 Composition of the cell membrane ➢ Protein 55% ➢ Phospholipids 25% ➢ Cholesterol 13% ➢ Other lipids 4% ➢ Carbohydrates 3%