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Passive Transport. No energy is used [High] [Low] (it’s the natural flow) This means it goes down a concentration gradient. What are the three types of passive transport?. 1. Diffusion 2. Osmosis 3. Facilitated Diffusion. [High] [Low]. Diffusion. Osmosis. CH 2 OH. OH. +. - PowerPoint PPT Presentation
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No energy is used[High] [Low] (it’s the natural flow)
This means it goes down a concentration gradient
What are the three types of passive transport?
1. Diffusion2. Osmosis3. Facilitated Diffusion
Diffusion
[High] [Low]
Osmosis
Facilitated Diffusion+ CH2OH
OH
Energy is used[Low] [High]
This means it goes up or against a concentration gradient
What are the three types of active transport?
1. Protein pumps2. Endocytosis3. Exocytosis
Protein PumpsProtein Pumps: proteins use energy to pull or pump
materials into or out of the cell to stockpile or store substances the cell needs
Different Types of Membrane Proteins (page 126)
TRANSPORTERS RECEPTORS ENZYMESSIGNAL/ RECOGNITION
Different Types of Membrane Proteins (page 126)
signal/recognition
Enzymes
receptor
transporter
2.
3.
4.
5.
• When a particle is engulfed into the cell.• 2 types
1. Phagocytosis: When a cell wraps part of its membrane arounda large particle forming a “pocket” or vesicle
2. Pinocytosis: The same process, but with smaller particles or liquids
Endocytosis
1. A vesicle carrying a substance 2. fuses with the cell membrane 3. and releases the substance
Exocytosis