Chatper 5 Flashcards
Membrane Structure is…
Highly Organized, phospholipid bilayer, gobular proteins lipid bilayer, and fluid mosiac model
Globular Protiens
Lipid Bilayer
Phospholipid
Bilayer
Fluid Mosiac Model
Mosiac of proteins floating above or on lipid bilayer
Cellular Membranes 4 components (PTIC)
Phospholipid Bilayer, Transmembrane Proteins, Interior Protein Network, Cell Surface Markers
Phospholipids consist of…
Glycerol, Phosphate group attached to glycerol, and 2 fatty acids attached to glycerol
Fatty Acids are ___ and ___
Non-Polar, Hydrophobic
Phosphate Group
Polar, Hydrophilic
Passive Transport is a
movement of molecules thru a membrane in which no energy is required
Molecules move in response to
Concentration Gradient
Diffusion moves from
High 2 Low
Facilitated Diffusion moves from
Low 2 High
3 Conditions determine direction
- Relative Concentration
- Voltage Difference
- Gated Channels, open or closed
Osmosis
Net diffusion of H20 across a membrane towards a higher solute
Solvent
Water
Solute
Dissolved Substance
Hypertonic
Higher Solute
Hypotonic
Lower Solute
Osmotic Pressure is the…
Force needed to stop osmotic flow
If membrane is strong enough…
The cell will reach counterbalance
If membrane is not strong enough…
The cell may burst
Extrusion is used in
Maintaining Osmotic Balance
What is Extrusion
Ejecting water out through contractile vacuoles
Plant cells use _____ _____ to push the cell membrane against cell wall to keep it ridgid
Turgor Pressure
