Passive and Active Transport Unit 2- Cell Structure and Function Outcomes: • Identify the factors which influence the rate and direction of diffusion. • Identify how osmosis is related to diffusion and the value of osmosis to living organisms. • Examine the mechanisms of active transport by identifying and explaining the two processes. • Compare the similarities and differences between active and passive transport.
Outcomes: Identify the factors which influence the rate and direction of diffusion. Identify how osmosis is related to diffusion and the value of osmosis to living organisms. Examine the mechanisms of active transport by identifying and explaining the two processes. - PowerPoint PPT Presentation
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Passive and Active TransportUnit 2- Cell Structure and Function
Outcomes:• Identify the factors
which influence the rate and direction of diffusion.
• Identify how osmosis is related to diffusion and the value of osmosis to living organisms.
• Examine the mechanisms of active transport by identifying and explaining the two processes.
• Compare the similarities and differences between active and passive transport.
**Don’t have to write these out**
Cellular Transport Cellular transport moves substances
within the cell and moves substances into and out of the cell
There are 2 types:1. Passive Transport2. Active Transport
Passive Transport These types of transport do not require
energy a) Diffusionb) Facilitated Diffusionc) Osmosis
A) Diffusion Remember from years before that
particles in solids, liquids, and gasses are in constant random motion (Particle Theory of Matter)
Substances dissolved in water move constantly in random motion
The random motion of these particles creates DIFFUSION
The amount of a substance in a certain area is called CONCENTRATION
Substances diffuse from an area of higher concentration to an area of lower concentration
Watch the following video and draw the diagram on the next page: http://
Active Transport This happens when substances have to
move from an area of lower concentration to an area of higher concentration
This process makes sure that cells have the proper amount of substances inside of them
These forms of cellular transport REQUIRE the use of ENERGY by the cell
a) Pumps (carrier proteins)b) Endocytosis/Exocytosis
A) Pumps (Carrier Proteins) Carrier proteins can move substances
against a concentration gradient Some pumps move one type of
substance in one direction across the plasma membrane
Other pumps move two substances in both directions across the plasma membrane
Sodium Potassium Pump This is a common type of pump moves 3 sodium ions out of the cell moves 2 potassium ions into the cell ATP (a form of energy) breaks down into