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Notes 5.1 Passive Transport. Page 97. Standards:. CLE 3210.1.5 - Compare different models to explain the movement of materials into and out of the cell. SPI 3210.1.8 - Compare active and passive transport. RLE 2010.2.1 - Recognize the importance of homeostasis as a survival mechanism. - PowerPoint PPT Presentation
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Notes 5.1 Passive Transport
Page 97
Standards:
CLE 3210.1.5 - Compare different models to explain the movement of materials into and out of the cell.
SPI 3210.1.8 - Compare active and passive transport.
RLE 2010.2.1 - Recognize the importance of homeostasis as a survival mechanism.
Objectives (today I will…)
1. Differentiate the different types of passive transport
2. Compare active and passive transport
3. Explore factors that affect passive transport
Types of Passive Transport(uses no energy)
• Diffusion
• Osmosis
• Facilitated Diffusion
Movement of solutes from an area of high concentration to an area of lower concentration.
Movement of water molecules from an area of high water concentration to an area of lower water concentration.
Diffusion of molecules across a membrane through channels and pores from an area of high concentration to an area of lower concentration.
Concentration
Concentration:
Two parts needed to determine concentration:• Solvent:
• Solute:
the amount of a substance in a given volume
The substance in the greatest volume, it is what the solute is dissolved in.
The substance in the smaller volume, it is the substance(s) that are dissolved in the solvent.
Concentration Example
Example: Salt water• Solvent?• Solute?
WaterSalt
Concentration Gradient
What is a gradient?change in the value of a quantity (as temperature, pressure, or concentration) with change in a given variable and especially per unit distance in a specified direction
Passive Transport = High to Low
Why will things move from high concentration to low concentration?
All molecules are moving.As they bump into each other they move faster until there is even space between them.
Passive Transport = EquilibriumEquilibrium:When the concentration of molecules is the same throughout the space the molecules occupy.
Activity
Gather in the designated space
How does this affect cells?
Diffusion:
Osmosis:
Solutes like oxygen, carbon dioxide, and other small molecules can get in or out of the cell with no energy needed.
Water can move freely in and out of the cell depending on its environment. (Can be good or bad depending on the environment.)
Video:
Watch the video and answer these questions with your table.
1.Describe what you see happening to the cells.
2. Relate this to the fact that the cell has a permeable membrane.
Facilitated Diffusion (Passive)
Definition:
Video - "Facilitated Diffusion" from my YouTube Channel
Diffusion of molecules across a membrane through channels and pores from an area of high concentration to an area of lower concentration.
Passive Transport Review:Three types:• Diffusion: • Osmosis:• Facilitated diffusion:
Common Characteristics:• Don't use any energy• Move from high to low concentration
small solutes (O2 or CO2) moving across the membrane
movement of water across the membrane
larger solutes (glucose) moving across the membrane through channels or pores
Exit Ticket (m.socrative.com, socrative app or a scrap piece of paper)
Room # 729158
•What is the difference between regular and facilitated diffusion?