We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byRebecca Whalen
Modified over 3 years ago
DIFFUSION & OSMOSIS
Cell membranes are permeable (having pores or openings) to water, therefore, the environment the cell is exposed to can have a dramatic effect on the cell.
Passive Transport Active Transport
DIFFUSION Molecules move from areas of higher concentrations to areas of lower concentrations
Osmosis: the movement of water molecules from an area of high concentration to an area of low concentration.
Isotonic : contains the same concentration inside & outside the cell. Water diffuses into & out of cell at the same rate. Isotonic
Hypotonic contains a low concentration) The water diffuses into the cell, causing the cell to swell and possibly explode. Hypotonic
Hypertonic : contains a high concentration The water diffuses out of the cell, causing the cell to shrivel. Hypertonic
Question? How does the cell membrane know what to let in and what to let out?
You should know & be able to explain the following points: DiffusionOsmosis Passive & Active Transport Selective Permeability Membrane structure
Diffusion The movement of molecules from an area of high concentration to an area of low. concentration.
Diffusion Diffusion- movement of any molecule from an area of high concentration to a low concentration Diffusion- movement of any molecule from an.
Osmosis. Energy requirements? No energy required Modes of passive transport? Diffusion through cell membrane The movement of a substance from.
Osmosis Osmosis is the net movement of water molecules over a partially permeable membrane from an area of less osmotic potential to an area of more negative.
Movement IN and OUT of Cells Substances move in and out through the cell membrane Moving from high to low concentration DOES NOT REQUIRE ENERGY by the.
Objectives: 1) Explain how the processes of diffusion and osmosis occur and why they are important to cells. 2) Predict the effect of a hypotonic, hypertonic,
Cellular Transport Unit 5. Passive Transport Does not use energy 1. Diffusion Movement of particles from an area of higher concentration to an area.
Passive Transport Movement of particles across the cell membrane without using energy Cellular Transport Cellular Structure and Function Three Modes.
Cells and Cellular Transport S7L2a Explain that cells take in nutrients in order to grow and divide and to make needed materials.
PASSIVE TRANSPORT Movement of molecules across a membrane that requires no energy and always occurs down a concentration gradient Types of passive transport.
Transport Across Plasma Membranes (Diffusion and Osmosis)
Diffusion & Osmosis Diffusion: Movement of solute from an area of high concentration to low concentration Osmosis: Diffusion of water.
Diffusion and Osmosis. Passive Transport Passive transport- movement of molecules across a cell membrane without energy input Refresh: Solute Object being.
PASSIVE TRANSPORT One way cells maintain homeostasis is by controlling the movement of substances across their cell membrane. Cells want to reach “equilibrium”.
The Cell Environment Jennifer Naples DI Biology. Cell Membrane Works as the gatekeeper of the cell It is selectively permeable – it lets some substances.
Passive Transport Section 4.1. Difference between active and passive transport Cells maintain homeostasis by controlling the movement of substances across.
Section 7-3 cont. Cellular Transport. Passive Transport Does not use energy 1. Diffusion Movement of particles from an area of higher concentration.
Osmosis. 2 Diffusion of water across a membrane Diffusion of water across a membrane Moves from high water potential (low solute) to low water potential.
Materials move across membranes because of concentration differences. 3.4 Diffusion and Osmosis High Concentration Low Concentration.
* Water Concentrations * Movement of water molecules (H20) across a permeable membrane. * Molecules move from area of high concentrations to areas of.
Transporting substances By Sangarun sangchachat Diffusion Diffusion is the movement of particles from an area of high concentration to an area of low.
Cell Transport. Diffusion The cytoplasm is a “solution” of many substances in water. Concentration=mass/volume Diffusion is the process by which molecules.
Transportation of Molecules. Cellular Transport Carbohydrate Chain Lipid Bilayer.
The Selectively permeable Cell Membrane Diffusion, osmosis, and active transport.
Cell Boundaries Chapter 7-3. Cell Membrane Regulates what enters and leaves the cell.
Transport Across Membranes. The Plasma Membrane A selectively permeable phospholipid bilayer with integrated proteins.
Diffusion and Osmosis. DIFFUSION The process in which molecules move from areas of HIGH concentration to areas of LOW concentration.
Chapter 7, Section 3 CELLULAR TRANSPORT. Overview of Lecture Passive Transport vs. Active Transport Types of Passive Transport Diffusion Facilitated diffusion.
Osmosis (diffusion of water through a selectively permeable membrane) Membrane X is permeable to water but not to protein Which side has the highest concentration.
Chapter 3. Passive Transport Diffusion – molecules move spontaneously (no energy used) from an area of high concentration to an area of low concentration.
Diffusion & Osmosis. Diffusion Diffusion The movement of molecules from an area in which they are highly concentrated to an area in which they are less.
Objectives 7.3 Cell Transport -Describe passive transport. -Describe active transport.
Cell Boundaries and Movement. Cell Barriers Cell membranes – Structure: contain a flexible lipid bilayer with imbedded protein molecules and carbohydrate.
Cell Membrane Transport: Osmosis 8.1 Section Objectives – page 195 Section Objective: Predict the effect of a hypotonic, hypertonic, or isotonic solution.
Chapter 4. Transport Across the Cell Membrane Substances need to move into and out of the cell in order to maintain homeostasis They can do this by.
Warm-up Turn to page 178 in your textbook and answer questions 1 through 4.
Cell Transport. Diffusion Process by which molecules tend to move from an area of high concentration to low concentration.
Cell Transport Osmosis and Diffusion. Particles in constant motion Run into each other and randomly spread out Particles move from an area of high.
November 20, 2015 Cell Membrane Transport Notes. I.) Types of Cell Membrane Transport There are 2 types of cell membrane transport: A.Passive Transport.
Movement through the channel Why do molecules move through membrane if you give them a channel? ? ? HIGH LOW.
Section Objectives Explain how the processes of diffusion, passive transport, and active transport occur and why they are important to cells. Predict.
Movement of Materials Through The Cell Membrane For a cell to maintain its internal environment, (i.e., achieve homeostasis) it has to be selective in.
Passive Transport Diffusion Osmosis Biology Unit - Regulation.
Cellular Functions Biology Agriculture. Movement of Materials DiffusionOsmosis Passive Transport Active Transport Hypotonic Solution Hypertonic Solution.
Ms. Mezzetti Lynn English High School Science Department.
Osmosis and Diffusion Semi-Permeable membrane – allows some things through and keeps other things out (Also called selectively permeable)
Cellular Structure and Function Animal Cell Plant Cell Plant and Animal Cell Structures 7.3 Structures and Organelles Chapter 7.
Osmosis Practice. 1. Environment _____________________ hypertonic Water leaves the cell and it shrivels or shrinks.
Hypertonic – more concentrated outside of cell. Study the diagram below. Which arrow shows the direction the solute molecules would move to achieve homeostasis?
© 2017 SlidePlayer.com Inc. All rights reserved.