Download Membranes and Transport

Botany Student Outline – Plant Cell Function
Plant Cell Function
1.
2.
•
3.
4.
Introduction
Plasma (Cell) Membrane (Plasmalemma)
•
Phospholipid Bilayer
*
Hydrophilic
*
Hydrophobic
•
Fluid Mosaic Model
Unit Membranes
A.
Proteins
i.
Integral Proteins
ii.
Peripheral Proteins
iii.
Glycoproteins
iv.
Glycolipids
B.
Cell Membrane Physiology
i.
Flexible Boundary
ii.
Facilitates Contact
iii.
Provides Receptors
iv.
Selective Permeability
a.
Ion Pumps
Membrane Transport
A.
Fluid Makeup
i.
Solvent
ii.
Solute
iii.
Solution
B.
Diffusion
i.
Concentration Gradient
ii.
Kinetic Energy
C.
Water Potential
i.
Standard: Pure Water = 1
ii.
Unit of Measure = Bar (or Megapascals)
Osmosis
A.
Osmotic Pressure
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Botany Student Outline – Plant Cell Function
B.
C.
5.
Transport Across the Membrane
A.
Passive transport
i.
Permeability Factors
a.
Size
b.
Solubility in Lipids.
c.
Ionic Charge
d.
Carrier Molecules
ii.
Simple Diffusion
iii.
Facilitated Diffusion
•
Concentration Gradient
•
Amount of Carrier
•
Binding Rate of Carrier and Solute
a.
Cotransport Mechanism
B.
6.
*
Isotonic Solution
*
Hypotonic Solution
*
Hypertonic Solution
Turgor
i.
Turgor Pressure
ii.
Growth
iii.
Stomatal Movements
Osmotic Control
Active Transport
•
ATP Phosphohydrolase
i.
Coupled Cotransport Systems
ii.
Electrochemical Gradient
iii.
Exocytosis
Membrane Potential
A.
Ion Pumps
•
Electrogenic Pumps
•
pH Balance
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Botany Student Outline – Plant Cell Function
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•
•
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Cotransport
Digestion
Cell Growth
ATP Synthesis
7.
Intercellular Communication
A.
Hormones
B.
Calmodulin and Ca2+
8.
Inter-Species Communication
A.
Example: Pseudomonas syringae
B.
Example: Fungus Colletotrichum lindemuthianum
9.
Lectins
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