Separating the Inside from the Outside for 3.7 billion years The Cell Membrane

Cell Parts Over the next week or so, we will be investigating the different parts that cells are made of. Cell parts are called organelles. You can think of them as the “organs” of a cell.

Systems A cell is a chemical system that carries out all of the functions of life. A car is a system for transportation Think of as many different parts of a car as you can.

The Car as a System A car is a system with many different parts. Each part has a structure (what it is) and a function (what it does). Fill out the car chart on your notes with your ideas.

Systems Logic Everything is a system. The Universe, you, this classroom, atoms… everything. Systems are made of different parts that work together to make the system behave the way it does. If one part of a system changes, the behavior of the entire system may change.

Cells: Systems of Life The parts of a cell work together to carry out all of the functions of life. If any of those parts change or malfunction, the entire system may not work as well, or at all. Every cell part plays an important part

The Cell Membrane A cell membrane (sometimes called a plasma membrane) surrounds all living cells

Cell Membrane Structure The cell membrane is a phospholipid bilayer.

Cell Membrane Structure Proteins are also an important part of the cell membrane

Parts of the Cell Membrane

Function of the Cell Membrane The function of the cell membrane is to control what materials enter and exit a cell

Cell Membrane Recap Structure: Phospholipid bilayer with proteins. Function: Controls what enters and exits a cell.

Homework “Cell Membrane” pp. 73-75 P. 83 #2