Plasma Membrane: Structure & Function Objective 2.03: Maintenance of Homeostasis Movement Into & Out of the Cell.

Slides:

Advertisements

Similar presentations

Plasma Membrane  Outer boundary of a cell  Gatekeeper - controls what enters and leaves the cell.

Advertisements

Cellular Transport How Molecules Are Transported Across The Cell Membrane.

The Biology of Anatomy A review of science past….

Cellular Membrane Notes About Cell Membranes 1. All cells have a cell membrane 2.Functions: a.Controls what enters and exits the cell to maintain an.

Plasma Membrane – aka cell membrane

Plasma Membrane & Cellular Transport

Maintaining a Balance. 1.The plasma membrane is a SELECTIVELY (SEMI-) PERMEABLE membrane that allows nutrients and wastes to enter and exit the cell.

7.2 PLASMA MEMBRANE.

The Plasma Membrane - Gateway to the Cell

 Surrounds all cells  Regulates cell’s internal environment  Maintains HOMEOSTASIS Maintains the same conditions constant inside the cell, regardless.

The Plasma (Cell) Membrane. Plasma Membrane Maintaining Balance Separates living cell from nonliving environment Allows flow of nutrients into and out.

Ch 7.2 Plasma Membrane Yesterday we talked about things all cells have. One of those things was the plasma membrane. Can you remember the other two? Lets.

Ch 7.2 Plasma Membrane Yesterday we talked about things all cells have. One of those things was the plasma membrane. Can you remember the other two? Lets.

The Cell Membrane.

The Plasma Membrane Section 7.2 p

4.3 Membrane Structure. Membrane Function Surrounds all cells Regulates cell’s internal environment ◦ Maintains HOMEOSTASIS  Maintains the same conditions.

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?

Cellular Transport Notes

MEMBRANE PERMEABILITY. Cell Membrane Cell Membrane 1. All cells have a cell membrane 2. Functions: a. Controls what enters and exits the cell to maintain.

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.

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?

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

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.

Cellular Transport: Cell Membrane How Molecules Are Transported Across The Cell Membrane.

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?

Biology, I.  Surrounds all cells  Regulates cell’s internal environment  Maintains HOMEOSTASIS Maintains the same conditions constant inside the cell,

Plasma Membrane  Responsible for homeostasis. Plasma membrane Thin, flexible boundary between a cell and its environment. Allows nutrients in and allows.

HOMEOSTASIS and the PLASMA MEMBRANE Carroll. Objectives Explain the function of the plasma membrane. Relate the function of the plasma membrane to the.

Lipids and Cell Membrane Structure. Lipids make up MOST of the cell membrane Lipids are not soluble in water Lipids store large amounts of energy The.

The Plasma (Cell) Membrane Structure and Function.

Plasma Membrane.

CELL TRANSPORT.

Cell Structure and Function 7.2

Lipids and Cell Membrane Structure

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.

The plasma membrane Unit 2 – Homeostasis.

The Plasma Membrane TSW understand the physical structure and functions of the cell membrane.

Cell Membrane Structure

Cellular Membrane Notes

Section 2: The Plasma Membrane

What can we compare this to in our bodies?

TEM picture of a real cell membrane.

The Plasma/Cell Membrane

Fluid Mosaic Model of the Cell Membrane

CELL (PLASMA) MEMBRANE

Section 2 The Plasma Membrane

Structure and Function

Cell Membrane & Homeostasis

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

The Cell Membrane.

Phospholipids and Membrane Structure

The plasma (Cell) membrane

The Plasma Membrane.

Section 2: The Plasma Membrane

Section 2: The Plasma Membrane

CELL (PLASMA) MEMBRANE

The Plasma Membrane.

The Cell Membrane!.

Presentation transcript:

Plasma Membrane: Structure & Function Objective 2.03: Maintenance of Homeostasis Movement Into & Out of the Cell

Plasma Membrane The Plasma Membrane & Cell Membrane are the same thing! In an Animal Cell, it is the boundary between the inside and outside of the cell. It is crucial in maintaining the cell’s homeostasis!! It is selectively permeable, meaning it is choosy about what enters and leaves the cell. It keeps nutrients in, and harmful substances out

Structure of the Plasma Membrane The plasma membrane is a Phospholipid Bilayer (Phospholipid = Fat, Bilayer = 2 layers) and has protein embedded in it. Remember, lipids do NOT dissolve in water, so that is why cells stay together in your body that is full of water! The round structures with tails are the Lipids. The big blue structure is the Protein.

More on the Phospholipids… The “heads” are hydrophilic (polar) and are attracted to the water inside and outside of the cell. The “tails” are hydrophobic (non polar) and do NOT like the water. The tails point to the middle of the plasma membrane.

Why is it called the Fluid Mosaic Model? Fluid: because the phospholipids and proteins are always moving around in the plasma membrane. Mosaic: because the large protein make a pattern within the plasma membrane.

So how do things get in & out?? Small things are able to squeeze through the phospholipid bilayer and do not cost the cell any energy. Large things must be pumped into the cell through one of the large proteins and this costs the cell energy!