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