Transcript Transport - Hicksville Public Schools / Homepage

Aim: How can we compare
active and passive
transport?
Do all things get through the cell
membrane?
Water
Molecules
SELECTIVELY PERMEABLE
How does a rollercoaster work?
When will he need energy?
Should I go
against the
gradient or down
the gradient
http://programs.northlandcollege.edu/biology/Biology1111/animations/transport1.html
Types of cell transport
• Active transport
• Energy required
• Against concentration
gradient
• From low to high
• Passive transport
• No energy required
• Down the
concentration gradient
• From high to low
Diffusion
Passive Transport
• Diffusion = movement
of O2 & CO2
• Facilitated diffusion
= alcohols & glucose
(needs membrane
protein)
• Osmosis = movement
of H2O
Active Transport
Phagocytosis
Pinocytosis
How can you tell?
3
1
2
Can you tell the difference?
Would you need energy?
Active vs. Passive Transport
Active
Transport
Energy
Required
Direction
Types
Yes
Passive
Transport
No
Low to
high
High to
low
Endocytosis,
exocytosis
Diffusion,
osmsosis,