Chapter 3 Notes
Elaine N. Marieb Katja Hoehn
CHAPTER
PowerPoint® Lecture Slides prepared by Vince Austin, Bluegrass Technical and Community College
Human Anatomy & Physiology
SEVENTH EDITION
Cells: The Living Units
3
P ART A
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
But First… Let’s clean up…
Hydrophobic Hydrophilic
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Plasma Membrane Separates intracellular fluids from extracellular fluids
Plays a dynamic role in cellular activity
Just like the doors, windows, and walls of a house
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
1
Fluid Mosaic Model Double bilayer of lipids (fats) with imbedded, dispersed proteins Bilayer consists of phospholipids, cholesterol, and glycolipids
Glycolipids are lipids with bound carbohydrate Phospholipids have hydrophobic and hydrophilic bipoles Cholesterol provides fluidity of membrane
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Fluid Mosaic Model
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.3
Membrane Junctions Tight junction – impermeable junction that encircles the cell
Like a sewing stitch
Desmosome – anchoring junction scattered along the sides of cells
Like an anchor
Gap junction – a nexus that allows chemical substances to pass between cells
Like door in submarines or space stations
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
2
Membrane Junctions: Tight Junction
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.5a
Membrane Junctions: Desmosome
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.5b
Membrane Junctions: Gap Junction
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.5c
3
Passive Membrane Transport:
CHAPTER
PowerPoint® Lecture Slides prepared by Vince Austin, Bluegrass Technical and Community College
Human Anatomy & Physiology
SEVENTH EDITION
Cells: The Living Units
3
P ART A
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
But First… Let’s clean up…
Hydrophobic Hydrophilic
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Plasma Membrane Separates intracellular fluids from extracellular fluids
Plays a dynamic role in cellular activity
Just like the doors, windows, and walls of a house
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
1
Fluid Mosaic Model Double bilayer of lipids (fats) with imbedded, dispersed proteins Bilayer consists of phospholipids, cholesterol, and glycolipids
Glycolipids are lipids with bound carbohydrate Phospholipids have hydrophobic and hydrophilic bipoles Cholesterol provides fluidity of membrane
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Fluid Mosaic Model
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.3
Membrane Junctions Tight junction – impermeable junction that encircles the cell
Like a sewing stitch
Desmosome – anchoring junction scattered along the sides of cells
Like an anchor
Gap junction – a nexus that allows chemical substances to pass between cells
Like door in submarines or space stations
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
2
Membrane Junctions: Tight Junction
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.5a
Membrane Junctions: Desmosome
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.5b
Membrane Junctions: Gap Junction
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 3.5c
3
Passive Membrane Transport: