4.3: The Plasma Membrane. Functions of the Plasma Membrane Allows only certain molecules to enter or leave Separates inside from outside Allows waste.

Slides:



Advertisements
Similar presentations
Plasma Membrane.
Advertisements

Cell membranes are composed of two phospholipid layers.
Plasma Membrane  Outer boundary of a cell  Gatekeeper - controls what enters and leaves the cell.
The Cell Membrane. What is the cell membrane? AKA: Plasma membrane AKA: Plasma membrane The boundary between the cell and the environment The boundary.
The Plasma Membrane Section 7.2.
Cell Membrane. Function of Cell Membrane  Separates the cell’s contents from materials outside the cell  Regulates what moves in and out of a cell 
Plasma Membrane. Cell Membrane 1. What is the special lipid found in the plasma membrane? 2. What do you think makes up the plasma membrane?
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Plasma Membrane Cells Basic Parts of a Cell The three basic parts.
Plasma Membrane: Structure & Function Objective 2.03: Maintenance of Homeostasis Movement Into & Out of the Cell.
3.3 Cell Membrane KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment.
The Plasma Membrane Section 7.2 p
The Cell Membrane. What is the cell membrane? AKA: Plasma membrane The boundary between the cell and the environment Does every cell have a cell membrane?
Objective: 4(B) Investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis of new molecules.
Eukaryotic Cell Membrane. Cell Membrane Cell membrane: the flexible boundary of a cell (also called a plasma membrane) It separates a cell from its surroundings.
CELL MEMBRANE: FLUID MOSAIC. CELL/ PLASMA MEMBRANE Separates the inside of the cell from its environment Receives messages from outside Allows things.
The Cell Membrane. What is the cell membrane? AKA: Plasma membrane The boundary between the cell and the environment Does every cell have a cell membrane?
The Plasma Membrane. The cell membrane functions as a semi- permeable barrier: The cell membrane functions as a semi- permeable barrier: allows a few.
Section 7-3 Cell Boundaries. Plasma Membrane or Cell Membrane The boundary between the cell and its environment. Controls what enters and leaves the cell.
Plasma Membrane  Thin, flexible boundary between the cell and its environment The Plasma Membrane Cellular Structure and Function  Allows nutrients.
3.3 Cell Membrane KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment.
The Cell Membrane The cell membrane is a fluid structure that forms a boundary between the cell the outside environment. Inside Outside Cell membrane.
Plasma Membrane.
Warm Up Name the organelle that… 1. Is a network of proteins that supports and gives shape to the cell 2. Processes and delivers proteins 3. Is located.
Phospholipid Bilayer. The Cell Membrane a phospholipid bilayer.
What is the cell membrane? AKA: Plasma membrane The boundary between the cell and the environment Does every cell have a cell membrane? Yes!, Each and.
The Cell Membrane. What is the cell membrane? AKA: Plasma membrane The boundary between the cell and the environment Does every cell have a cell membrane?
THE CELL MEMBRANE The Key to Cellular Transport. Characteristics of the Cell Membrane  Made of phospholipids – arranged in two layers called a bilayer.
Plasma Membrane  Responsible for homeostasis. Plasma membrane Thin, flexible boundary between a cell and its environment. Allows nutrients in and allows.
1. What is the function of the structure below?
The Cell Theory  All organisms are composed of one or more cells. 7.1 Cell Discovery and Theory Cellular Structure and Function  The cell is the basic.
Structure of Cell Membranes Fluid mosaic model Mixed composition: –Phospholipid bilayer –Glycolipids –Sterols –Proteins.
The Plasma Membrane Biology I.
Cell Membrane.
Plasma Membrane.
Structure of the plasma membrane
Cell Structure and Function 7.2
Cells & Their Environment
The Plasma Membrane 7.2.
The Plasma Membrane Essential Questions: How does the structure of the plasma membrane allow it to function as a regulatory organelle and protective.
Plasma Membrane.
You Must Know (Chapter 3.2)
Cell Membrane.
The plasma membrane Unit 2 – Homeostasis.
Cell Membrane Structure (1.2)
Cell Membrane Structure
Cellular Membrane Notes
TEM picture of a real cell membrane.
Cell membranes are composed of two phospholipid layers.
The Plasma/Cell Membrane
The Plasma Membrane.
CELL (PLASMA) MEMBRANE
All organisms are composed of one or more cells.
Plasma Membrane Structure and Function
7.2 The Plasma Membrane Main Idea: The plasma membrane helps to maintain homeostasis in the cell.
3.3 Cell Membrane.
Cell Membrane Structure
CELL MEMBRANE.
The plasma (Cell) membrane
Prof. Ainar S.G.(M.Sc,M.Phil)
CELL (PLASMA) MEMBRANE
The Cell Membrane.
The Plasma Membrane Plasma Membrane Functions
SWBAT describe membrane structure
The Plasma Membrane.
The Cell Membrane!.
Cell Transport Notes: Cell Membrane.
The Plasma Membrane.
The Plasma Membrane Section 7.2.
Pre-AP Biology Membrane Structure & Function
Presentation transcript:

4.3: The Plasma Membrane

Functions of the Plasma Membrane Allows only certain molecules to enter or leave Separates inside from outside Allows waste to be expelled Interacts with its environment

Two Parts of Membrane 1. Membrane Lipids - Phospholipids form a bilayer Heads are in the water, tails are out Sterols - other lipids between the tails that make the membrane more firm, prevent freezing

Two Parts of Membrane 2. Membrane Proteins - “Integral proteins” Embedded in the lipid bilayer

Uses: To identify the cell type Channels, allow certain substances to enter Docking sites for chemical messengers

Fluid Mosaic Model The idea that the membrane behaves like a fluid more than a solid. The proteins can move laterally within the bilayer.