Basic Cell Structure The Cell Membrane

Slides:



Advertisements
Similar presentations
Homeostasis refers to the necessity of an organism to maintain constant or stable conditions. In order to maintain homeostasis, all organisms have processes.
Advertisements

Cells and Their Environment
Membranes Chap. 5. Phosophlipids Phospholipids will form a bilayer when placed in water. Phospholipid bilayers are fluid.
Osmosis.  Energy requirements?  No energy required  Modes of passive transport?  Diffusion through cell membrane  The movement of a substance from.
Osmosis.
Movement of particles across the cell membrane without using energy
Passive Transport Section 4.1.
Microorganisms. Cell Membrane - aka “Plasma Membrane” and “Fluid Mosaic Membrane” -All cells have cell membranes -Functions: a.Controls what enters and.
Cell Membrane Transport Notes
Facilitated Diffusion Active Transport
Diffusion The movement of molecules from an area of high concentration to an area of low. concentration.
Cellular Transport Test Review. What does this picture represent??
Water, Cells, Membranes and Cellular Transport. HOMEOSTASIS survival depends on the ability to maintain proper conditions maintaining balance is called.
Getting In & Out of a Cell Osmosis & Diffusion Getting In & Out of a Cell Osmosis & Diffusion.
I.The Cell Membrane Controls what enters and leaves the cell
Cell Transport. Diffusion Process by which molecules tend to move from an area of high concentration to low concentration.
Membrane Structure and Function The plasma membrane controls what enters and leaves the cell.
Part 3: Homeostasis and Cell Transport (Chapter 5)
Cell Membrane What is it? – Barrier that separates cell from external environment – Composed of two phospholipid layers Other molecules are embedded in.
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.
Hypertonic – more concentrated outside of cell. Study the diagram below. Which arrow shows the direction the solute molecules would move to achieve homeostasis?
Transportation of Molecules. Cellular Transport Carbohydrate Chain Lipid Bilayer.
Materials move across membranes because of concentration differences.
KEY CONCEPT Materials move across membranes because of concentration differences. 3.4 Diffusion and Osmosis.
Cellular Transport How Molecules Are Transported Across The Cell Membrane.
Cellular Transport: movement of materials in and out of a cell  Homeostasis: combination of two words  Homeo = same  Stasis = steady  Homeostasis:
Chapter 7, Section 3 CELLULAR TRANSPORT. Overview of Lecture Passive Transport vs. Active Transport Types of Passive Transport Diffusion Facilitated diffusion.
Cell Transport. Structure of the Cell Membrane Made of phospholipids and proteins Made of phospholipids and proteins Phospholipids look like a head with.
Transport Across Membranes. The Plasma Membrane A selectively permeable phospholipid bilayer with integrated proteins.
I.The Cell Membrane Controls what enters and leaves the cell
3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.
Notes: Cellular Transport
Why is the cell membrane so important?
Movement through the Membrane
The Cell Membrane Selectively permeable (semi-permeable)
Section 4 Cellular Transport
Active and Passive Transport
Cell Transport.
Diffusion and Osmosis
Today’s Date Here Objective Here!.
3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.
Cellular Transport Notes
Cellular Transport.
3.4 Diffusion and Osmosis KEY CONCEPT Materials move across membranes because of concentration differences.
Plant and Animal Cell Structures
Section Objectives Predict the movement of water and other molecules across selectively permeable membranes. (SPI ) Compare and contrast.
Cellular Physiology TRANSPORT.
Chapter 3.4 Diffusion and Osmosis
Types of Cellular Transport
Cell Membranes Practice Test
Cellular Transportation
Diffusion and Osmosis.
Cell Membranes Practice Test
Movement of particles across the cell membrane without using energy
Cell membranes are composed of two phospholipid layers.
Cellular Transport 7.4.
Cell Membranes Osmosis and Diffusion
Movement Through a Membrane
Movement through a Cell Membrane
Movement of particles across the cell membrane without using energy
Cell Processes 7th 15.2 Cell Transport.
Chapter 7 Cellular Structure and Function
Cell Membrane 11/16/10.
Cell Transport Unit 4.
BELLWORK What are the three organelles that only plants have?
Types of Cellular Transport
Cells and Their Environment
Moving Cellular Materials
Cellular Transport Notes
Movement of particles across the cell membrane without using energy
Presentation transcript:

Basic Cell Structure The Cell Membrane The outside of all cells are surrounded by a membrane made of phospholipids. Nickname: “The gatekeeper”

Membrane Structure There are proteins “stuck” in the membrane that help get things into and out of the cells. They also help to get messages into the cell.

Proteins in Membrane

The Membrane is a lipid bilayer.

Cell Membrane Selective Permeability –membrane’s ability to allow SMALL molecules through and keeps LARGE molecules OUT. Helps maintain HOMEOSTASIS.

How do molecules get into and out of a cell?

Transport through the membrane Two types Passive Transport Energy NOT required Active Transport Energy is required

Diffusion Movement of molecules from higher concentration lower concentration Always higher to lower! No energy input required!

Osmosis:Diffusion of water through a cell membrane

Solutions Higher concentration of solutes = HYPERTONIC. Lower concentration of solutes is HYPOTONIC. Equal solute concentrations are ISOTONIC.

3 types of Solutions

What types of solution? Hypertonic Or Hypotonic

Facilitated Diffusion Energy is NOT required to move substances across the membrane. Protein

Facilitated Diffusion Glucose molecules High Concentration Protein channel Cell Membrane bilayer Low Concentration

Active Transport Energy is required. Need ATP- the universal energy molecule. Low to high

Some molecules are too large to get through any type of protein. Endocytosis Into Exocytosis Out of

ENDOCYTOSIS 59

Inside of the cell Outside of the cell Exocytosis

What is rate of transport? How many molecules can cross the membrane in a given amount of time

Effects on Transport Decreases Increases Rate of Transport Large Size Small Increases Temp. Hot Cold Concentration High Low

Compare/ Contrast Passive Transport Active Transport

Types of Cellular Transport high low Weeee!!! Passive Transport cell doesn’t use energy Diffusion Facilitated Diffusion Osmosis Active Transport cell does use energy Protein Pumps Endocytosis Exocytosis high low This is gonna be hard work!!