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?

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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?

Plasma Membrane and Cell Wall

Fill in the chart at the top of your notes. Use your notes if necessary.

Cell Membrane Functions: forms a boundary between inside and outside of the cell controls passage of materials

Membrane: Prokaryotic Cell

Membrane: Eukaryotic Cell

Cell Wall Provides Structure & Support

Cell Wall: Prokaryotic Cell

Cell Wall: Eukaryotic Cell

Phospholipid: Structure Phosphate Head Lipid Tail Hydrophilic: LOVES water Hydrophobic: HATES water

Cell Membrane Structure Read the instructions found with your fasteners. Use your fasteners to model the structure of a cell membrane

Phospholipid bilayer Membrane is made up of two layers of phospholipids. With this arrangement in mind, where is the “water” in the diagram? WATER Hydrophilic: LOVES water Hydrophobic: HATES water

Location: Surrounds the cell and organelles

Function of Phospholipids Controls what comes in and out of cells; the gatekeeper

Characteristics of Phospholipid Bilayer Fluid Mosaic Model: The cell membrane is flexible - Behaves like a fluid - like oil on water - Phospholipids can move from side to side slide past each other

Characteristic of Phospholipid Bilayer Selectively Permeable (semipermeable) Some molecules can cross the membrane while others cannot.

Characteristic of Phospholipid Bilayer Selectively Permeable (semipermeable) Some molecules can cross the membrane while others cannot.

Cholesterol Location: Found in between the phospholipids in the bilayer. Function: Keeps the membrane together; the phosphate heads are not attached to each other

Proteins Location: Within the phospholipid bilayer

1. Transport Proteins Helps larger substances pass through the bilayer

2. Glycoprotein: Protein with a carbohydrate Helps cells recognize similar cells; similar cells form tissue

Carbohydrate Location: On the top of proteins or phospholipids Function: Help recognized similar cells to form tissues OR to recognize foreign substances in the cell

*

Cell Wall Location: Layer outside of the cell membrane in some organisms Function: Provide structure and support

Plants Cell Wall

Bacteria Cell Wall

Fungus

Phytoplankton Cell Wall

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