Cell Membrane and Membrane Transport

Membrane Structure and Function

Composition: 98% Lipids (75% phospholipids, 20% cholesterol, 5% glycolipids)

Membrane Structure and Function

Proteins: <2% (transmembrane & peripheral)

Membrane Structure and Function

Fluidity of the membrane

Cholesterol

Membrane Structure and Function

Protein Functions

Membrane Structure and Function

Protein Functions

Membrane Transport

Brownian Motion• http://www.youtube.com/watch?v=cDcprgWiQEY

Membrane Transport

Passive—diffusion

Membrane Transport

Membrane Transport

Osmosis

Membrane Transport

Tonicity

Membrane Transport

Animals vs. Plants

Membrane Transport

Facilitated transport: passive but uses transport proteins

Membrane Transport

Facilitated transport: Rate of diffusion is limited by concentration

Membrane Transport

Active

Membrane Transport

Exocytosis vs. Endocytosis

• http://media.pearsoncmg.com/bc/bc_0media_bio/bioflix/bioflix.htm?cc7membrane• http://www.youtube.com/watch?v=JnlULOjUhSQ&feature=related

Energy and the Cell

ATP

Energy and the Cell

ATP & phosphorylation

Energy and the Cell

ATP & phosphorylation

How Enzymes Function

Activation Energy

How Enzymes Function

Activation Energy

How Enzymes Function

Activation Energy

How Enzymes Function

http://www.youtube.com/watch?v=V4OPO6JQLOE

How Enzymes Function: Inhibition

How Enzymes Function: Inhibition

Feedback Inhibition