C e l l M e m b r a n e Homeostasis Lipid Bilayer Membrane Proteins

Slides:

Advertisements

Similar presentations

Plasma Membrane.

Advertisements

Chapter 3.  Encloses the cell and forms a boundary  Separates the interior of the cell from its surroundings  Interior is filled with cytoplasm 

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 and Homeostasis Homeostasis – Maintaining a Balance Cells must keep the proper concentration of nutrients and water and eliminate.

Cellular Transport How Molecules Are Transported Across The Cell Membrane.

The Cell (aka Plasma) Membrane intro mini-movie intro mini-movie.

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 

Active Reading: “Cell Features”

Section 1: Cell Membrane

Ch. 8 Cells & Their Environment

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

3.3 Cell Membrane KEY CONCEPT The cell membrane is a barrier that separates a cell from the external environment.

In or Out? 1. What are some things that can pass through a window screen? 2. What are some things that cannot pass through a window screen? Why is it.

Ms. Hughes.  All living things respond to their environments.  Homeostasis is the maintenance of stable internal conditions in a changing environment.

Cellular Transport Notes

Objective: 4(B) Investigate and explain cellular processes, including homeostasis, energy conversions, transport of molecules, and synthesis of new molecules.

Cell Membranes.

Directed Reading: “Cell Features”

Unit: Cellular Structure & Function All cells have a cell membrane that separates the cell from its non-living surroundings. It is a thin barrier; approximately.

Cell Membrane Diffusion & Osmosis Active Transport, Endocytosis, & Exocytosis Sections 3.3, 3.4, & 3.5.

CELL (PLASMA) MEMBRANE Chapter 4 Pg Homeostasis Balanced internal conditions of cells Maintained by cell membrane controlling what enters or.

Learning Goal: Identify the major components of a cell membrane.

Cells & Their Environment. Cell Membrane **Every cell is surrounded by a cell membrane! - protects cell - helps move substances in & out of the cell.

Cells and Their Environment B-2-5 Explain how active, passive, and facilitated transport serve to maintain the homeostasis of the cell.

Ch. 8 Cells & Their Environment

THE CELL MEMBRANE The Key to Cellular Transport. Characteristics of the Cell Membrane  Made of phospholipids – arranged in two layers called a bilayer.

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.

The Cell Membrane. I.) What is the cell membrane? A. AKA: Plasma membrane B. The boundary between the cell and the environment C. Does every cell have.

Homeostasis Living things respond to their environment Cells maintain homeostasis by controlling the movement of substances across the cell membrane.

Homeostasis What are the four functions that the cell membrane performs to maintain homeostasis? 1.Regulates what goes in and out of the cell. Acting.

Cell membranes are composed of two phospholipid layers.

The Cell (Plasma) Membrane

Structure of the plasma membrane

Cells & Their Environment

The Plasma Membrane Essential Questions: How does the structure of the plasma membrane allow it to function as a regulatory organelle and protective.

Cell Transport.

8.1 Cell Membrane I. Homeostasis

The Cell Membrane.

Cell Membrane/Plasma Membrane Structure

Cell Membrane Structure

Cellular Membrane Notes

TEM picture of a real cell membrane.

Fluid Mosaic Model of the Cell Membrane

CELL (PLASMA) MEMBRANE

Section 2 The Plasma Membrane

Structure and Function

Chapter 8 Cell Transport

Learning Goal: Identify the major components of a cell membrane.

Unit 4: Cells 4.3 Cell Membrane

Biology Bellringer: What is a lipid?

Homeostasis Maintenance of a stable internal environment

Cells and their Environment

Cell Membrane & Cellular Transport

8.1 Cell Membrane I. Homeostasis

The plasma (Cell) membrane

Cell membranes are composed of two phospholipid layers.

Maintaining Homeostasis

The Plasma Membrane Section 7.2.

CELL (PLASMA) MEMBRANE

The Cell Membrane 3.3 E.Q.: How is the structure of the cell membrane important for its function?

Cell Membrane notes.

The Plasma Membrane Section 7.2.

The Cell Membrane.

Presentation transcript:

C e l l M e m b r a n e Homeostasis Lipid Bilayer Membrane Proteins Structure Barrier Membrane Proteins Proteins in Lipids Types of Proteins

Homeostasis Maintenance of stable internal conditions in a changing environment. Must maintain homeostasis to live

Homeostasis All living things respond to their environment. How do you respond to hot weather? Cold weather?

H o m e o s t a s I s Cells maintain by controlling movement across cell membrane Some materials allowed through; others not = gatekeeper

Cell membrane

Structure Lipid bilayer Barrier Sea of phospholipids Phosphate “head” = Polar = charge at each end, likes h20 two fatty acid “tails”= nonpolar = ????????

Lipid bilayer Barrier ~ only small, nonpolar substances can pass

Membrane proteins

Membrane proteins Some. . . Face outside Face inside Stretch across and face both ways ~Polar portion attracted to water on either side ~Non polar portions attracted to interior

Membrane proteins Cell-surface markers “name tag” Chain of sugars (carbohydrates) Attached to surface by glycoproteins  (proteins attached to Carbohydrate, help cells work together)

Membrane proteins Enables sensing Once it of binds, this surroundings Receptor proteins Enables sensing of surroundings by binding to substances outside cell Receptor proteins Once it binds, this causes changes to occur inside cell

Membrane proteins Enzymes Assist w/ chemical rxns inside cell

Membrane proteins Aid in the mvmt of substances in & out of cell Transport proteins Aid in the mvmt of substances in & out of cell Why do some substances need help moving thru the membrane? Only small, nonpolar substances can pass. The nonpolar middle repels any polar & large substances!