Cell Membrane Plasma Membrane. Cell Membrane 2 layers (bilayer) of phospholipids Similar to a mayonnaise sandwich –2 pieces of bread with may stuck together.

Slides:

Advertisements

Similar presentations

Plasma Membrane Notes. CHARACTERISTICS: Maintains homeostasis (balance with environment) Selective permeability – allows some molecules into the cell.

Advertisements

Cellular Transport How Molecules Are Transported Across The Cell Membrane.

(Phospholipid Bilayer). The Cell Membrane is Semi-Permeable or Selectively Permeable. This means it only allows certain substances to enter/exit the cell.

The Plasma Membrane aka the cell membrane

Chapter 7: Cells.  1) Regulates what goes in and out  (selectively permeable- some molecules too large or too strongly charged to cross while others.

Warm-Up #2 10/30/12 1) What does this picture represent? 2) What does hydrophilic mean? Hydrophobic? 3) What does selective permeability mean? 4) Where.

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

Mr. Chapman Biology 30.  Cells require protection, nutrients, water, elimination of waste, and response to stimuli.  The cell membrane performs all.

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.

Wake-up 1.How can you tell the difference between an onion cell and a Elodea cell? 1.Why was the Human cheek cell round and not square? -Turn in Wake-up.

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

Cell Membrane Structure

CELL MEMBRANE: FLUID MOSAIC. CELL/ PLASMA MEMBRANE Separates the inside of the cell from its environment Receives messages from outside Allows things.

Starter 1.What are the two categories of cells? 2.How are they different? 3.What are examples of each?

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.

Plasma Membrane [7.2] Goals: Understand the concept of homeostasis in relation to the plasma membrane Demonstrate and understand how the plasma membrane.

Phospholipid A phospholipid is a type of lipid used in the cells of living things.

Cell membrane: Fluid mosaic. What Are Characteristics Of The Cell Membrane? Selectively permeable Composed of –Lipids –Proteins.

Plasma Membrane.

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

Do Now! Brainstorm: What parts of a house separate it from it’s external environment? What may enter through those parts?

Phospholipid Bilayer. The Cell Membrane a phospholipid bilayer.

Do Now Turn in your plant & animal cell lab from yesterday Turn in your Prok. & Euk. Interactive What type of cell is pictured below? How do you know?

Prokaryotes and the Cell Membrane. What is a cell?  The basic unit of all forms of life. Each surrounded by a membrane  Two Types: Prokaryotes- the.

Membranes organize a cell’s activities Ch ► Plasma membrane acts as a cell’s boundary ► Regulates the traffic of chemicals that go in and out of.

Cell Transport Really cool animations! gical%20anamations.html

Opening Activity 11/3/15 Scientists refer to the cell membrane as a fluid mosaic model. What is a mosaic? (hint: the pictures below are mosaics)

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

The Cell Membrane.

1. 2 CELL MEMBRANE  holds the cell together  keeps all of the pieces (like the organelles and the cytoplasm) inside the cell  controls what goes in.

Warm-Up Turn in Microscope Lab and vocabulary. 1. Have a clean sheet of notebook paper for the warm-up. 1.Define.

Cell membrane: Fluid mosaic

Date: November 14, 2016 Aim #24: How does the structure of the cell membrane contribute to its function? HW: Daily Review of class notes. Castle Learning.

Warm Up for 10/4: In a sentence or two, explain why the oil can’t “mix” with the water molecules.

What is the function of the cell membrane?

The Plasma Membrane 7.2.

Plasma Membrane.

What is the function of the cell membrane?

Cell Membrane Structure

Cell Membrane Strucutre

Protecting the cell since…forever.

Cell Membrane Structure and Function

Passive Transport.

Fluid Mosaic Model of the Cell Membrane

Biological Membranes Sections

Structure and Function

Cell Membrane Strucutre

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 Membranes Page #

Cell Membranes (structure and function)

The Cell Membrane.

Phospholipids and Membrane Structure

Do Now Put away belongings Bring binder to desk

The plasma (Cell) membrane

Cell Membrane Strucutre

The Plasma Membrane.

Notes on The Cell Membrane.

Cell Membranes Page #

SWBAT describe membrane structure

Cell Membrane Structure and Function

The Cell Membrane!.

Passive Transport.

Presentation transcript:

Cell Membrane Plasma Membrane

Cell Membrane 2 layers (bilayer) of phospholipids Similar to a mayonnaise sandwich –2 pieces of bread with may stuck together Each individual phosphoplipid has a –head that is hydrophilic –tail that is hydrophobic

The phospholipid

STOP!! BIG WORDS!!!! Hydrophobic: Hydro = Water ; Phobic = afraid –The tail of the phospholipid is hydrophobic Hydrophilic: Hydro = Water ; Philic = loving –The head of the phospholipid is hydrophilic Millions of these molecules line up together to form a cell membrane!

What is the cell membrane for? Controls material going into the cell Controls material going out of the cell Holds the cell together Able to “talk” with other cells and molecules Phospholipid Head Tail

Cell Membrane

Membrane looks big? Picture this……. It would take 10,000 membranes to equal the thickness of one sheet of paper!!!

Cell Membrane Proteins Proteins are stuck throughout the cell membrane They act as tunnels letting large molecules into and out of the cell

Receptor Molecules Molecules that that help the cell “talk” with other cells or molecules Must fit together like a puzzle piece

Keep in mind…... Not all substances can pass through the cell membrane!!! Only certain substances when needed…….this is called SELECTIVE PERMEABILITY …. Know what this means……