Warm-Up

•Take out a clean sheet of paper and answer the following question:

•What is a cell?

Warm-Up

•A cell is defined as:

“The structural, functional and biological unit of all organisms.”

Source: www.biology-online.org

Interesting Facts!

•A cell is the smallest unit of an organism that is classified as living, making it the “building block of life”

•Humans have about 100 trillion cells •There are about 2.5 trillion blood cells in

your body at any given time.•25 million new cells are being produced

every second in your body. •Longest cell can reach from the toe to the

lower brain stem.

Objectives

•1. The students will be able to identify the major organelles in a cell.

•2. The students will be able to define the functions of each major organelle.

Today’s Agenda

•Warm-up•Main cell organelles PowerPoint

presentation• Labeling worksheet•Group Poster activity•Closure

Main Cell Organelles

Main cell organelles

•Nucleus•Mitochondrion•Rough endoplasmic reticulum (RoughER)•Smooth endoplasmic reticulum

(SmoothER)•Golgi apparatus•Ribosomes•Cell Membrane

Nucleus The “brain” of the cell

•Contains genetic information necessary for reproduction, growth and metabolism of the cell

Mitochondria The cells “power

house” • Converts energy

into forms that are useable by the cell.

• Site of cellular respiration, generating ATP, or the fuel for the cells activities

Rough Endoplasmic Reticulum (Rough ER)

• Function in the processing and transport of proteins made by ribosomes

• Gets the name rough for the ribosomes that cover its surface, making it appear bumpy

Smooth Endoplasmic Reticulum (SER)

•Work with certain enzymes in providing storage space and surface areas.

•Controls movement of newly made proteins to their proper locations

Golgi Apparatus

•Modify, sort and package proteins and other materials from ER for storage in the cell or secretion outside the cell.

Endomembrane System

Ribosomes

•Make proteins• Synthesize and

assemble amino acids to form specific proteins

•Located throughout the cell and on the RoughER

Cell Membrane

The cells “Gate Keeper”•“Plasma Membrane”•Encloses the cell and its contents. • Selectively Permeable, controls what enters

and leaves the cells

Labeling!

Group Poster Activity• Each group will be assigned one of the cell organelles we

just learned about.1- Nucleus2-Mitocondria3- Rough and Smooth ER4-Golgi Apparatus5-Ribosome6-Cell Membrane• With your notes and one another construct a poster on your

given cell organelle. Include the following: - a drawing of the organelle - a drawing of pneumonic device for the function of each

organelle. - description of its function in the cell.

Exit Card:

On a note card, write one thing you learned in class today.