Unit 3 Cell Membranes, Diffusion, And Osmosis
Upcoming SlideShare
Loading in...5
×
 

Unit 3 Cell Membranes, Diffusion, And Osmosis

on

  • 6,970 views

 

Statistics

Views

Total Views
6,970
Views on SlideShare
6,950
Embed Views
20

Actions

Likes
1
Downloads
193
Comments
0

4 Embeds 20

http://www.slideshare.net 8
https://jujo00obo2o234ungd3t8qjfcjrs3o6k-a-sites-opensocial.googleusercontent.com 7
http://meb2097.1bestarinet.net 3
http://olympushighschool.blogspot.com 2

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Unit 3 Cell Membranes, Diffusion, And Osmosis Unit 3 Cell Membranes, Diffusion, And Osmosis Presentation Transcript

  • Plant cells have cell walls and chloroplasts.
    A cell wall provides rigid support.
  • Plant cells have cell walls and chloroplasts.
    A cell wall provides rigid support.
    Chloroplasts convert solar energy to chemical energy.
  • KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment.
  • Cell membranes are composed of two phospholipid layers.
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane has two major functions.
    cell membrane
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane has two major functions.
    forms a boundary between inside and outside of the cell
    cell membrane
    outside cell
    inside cell
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane has two major functions.
    forms a boundary between inside and outside of the cell
    controls passage of materials
    cell membrane
    outside cell
    inside cell
  • Cell membranes are composed of two phospholipid layers.
  • cell membrane
    Cell membranes are composed of two phospholipid layers.
    The cell membrane is made of a phospholipid bilayer.
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane is made of a phospholipid bilayer.
    There are other molecules embedded in the membrane.
    carbohydrate
    chain
    protein
    cell membrane
    cholesterol
    protein
    protein channel
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane is made of a phospholipid bilayer.
    There are other molecules embedded in the membrane.
    The fluid mosaic model describes the membrane.
    carbohydrate
    chain
    protein
    cell membrane
    cholesterol
    protein
    protein channel
  • Cell membranes are composed of two phospholipid layers.
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane is selectively permeable.
    Some molecules can cross the membrane while others cannot.
  • Cell membranes are composed of two phospholipid layers.
    The cell membrane is selectively permeable.
    Some molecules can cross the membrane while others cannot.
  • Chemical signals are transmitted across the cell membrane.
    Receptors bind with ligands and change shape.
    There are two types of receptors.
  • Chemical signals are transmitted across the cell membrane.
    Receptors bind with ligands and change shape.
    There are two types of receptors.
    intracellular receptor
  • Chemical signals are transmitted across the cell membrane.
    Receptors bind with ligands and change shape.
    There are two types of receptors.
    intracellular receptor
    membrane receptor
  • KEY CONCEPT Materials move across membranes because of concentration differences.
    Diffusion and Osmosis
  • Passive transport does not require energy input from a cell.
    • Molecules can move across the cell membrane through passive transport.
    • There are two types of passive transport.
    • diffusion
    • osmosis
    Diffusion and Osmosis
  • Diffusion and osmosis are types of passive transport.
    • Molecules diffuse down a concentration gradient.
    Diffusion and Osmosis
  • Diffusion and osmosis are types of passive transport.
    • Osmosis is the diffusion of water molecules across a semipermeable membrane.
    Diffusion and Osmosis
  • Diffusion and osmosis are types of passive transport.
    • There are three types of solutions.
    • isotonic
    • hypertonic
    • hypotonic
  • Some molecules can only diffuse through transport proteins.
    • Some molecules cannot easily diffuse across the cell membrane.
    • Facilitated diffusion is diffusion through transport proteins.
    Diffusion and Osmosis
  • KEY CONCEPT Cells use energy to transport materials that cannot diffuse across a membrane.
    Active Transport, Endocytosis, and Exocytosis
  • Active transport requires energy input from a cell and enables a cell to move a substance against its concentration gradient.
    • Passive transport requires no energy from the cell.
    • Active transport is powered by chemical energy (ATP).
    • Active transport occurs through transport protein pumps.
    • Cells use active transport to maintain homeostasis.
  • A cell can import and export large materials or large amounts of material in vesicles during the processes of endocytosis and exocytosis.
    • Cells use energy to transport material in vesicles.
    • Endocytosis is the process of taking material into the cell.
    • Phagocytosis is a type of endocytosis.
    Active Transport, Endocytosis, and Exocytosis
  • A cell can import and export large materials or large amounts of material in vesicles during the processes of endocytosis and exocytosis.
    • Cells use energy to transport material in vesicles.
    • Exocytosis is the process of expelling material from the cell.
    Active Transport, Endocytosis, and Exocytosis