WARM-UP:

1) True/False: Chloroplast are found in plant cells.

2) What is the nucleus’ main job?

Agenda1) Warm-Up 5 min

2) Cell Theory Notes II 25 min

3) Cell Organelle WS II 25 min

LEARNING GOALS: • Cells are the basic unit of life.• Structures within cells have specific functions.• Cells have different levels of complexity.• Prokaryotic cells have no nucleus.• Eukaryotic cells have a nucleus and membrane bound organelles

HOMEWORK DUE:

09-21-11

True

The “brain” of the cell—control the cells inner workings

Organism

Organ

Tissue

Cell

Organelle

Cell Biology

Cell StructureWhat is the Cell Theory?

The cell is the basic unit of structure and function in the human body.

It can be specialized to do many things.Just as the objective of Santa’s shop is to

make toys the objective of a cell is to make proteins.

What might the function of this cell be?

II. Cell StructureThe cell consists of a mass of cytoplasm

surrounded by a cell membrane.The cytoplasm contains tiny structures

called organelles. Each organelle performs a specific function for the cell.

The Organelles

Nucleus:(Brain of cell / Safe)

Large organelle surrounded by a double layered nuclear membrane.

It contains chromatin, made of DNA, which controls the cells activities. (Santa’s List)

Nucleus

Nuclear Membrane

Chromatin

Nucleus

Nucleolus (Ribosome Factories) Found in nucleus. Dark area that is important in making ribosomes.

Ribosomes /Elves (Protein factories of the cell)

Where amino acids are assembled to form proteins during protein synthesis.

Located on the ER or floating in the cytoplasm.

A network of passageways made from membranes that transports proteins around the cell.

Rough ER has ribosomes.Smooth ER has no ribosomes.

Endoplasmic Reticulum (Ski slope of the cell)

Endoplasmic Reticulum

Golgi Complex (UPS of the cell)

A series of saclike membranes where proteins are packaged, stored, and shipped off to their destinations.

Mitochondria (power plant of the cell)

Rod-shaped organelle, covered by a double membrane, where cellular respiration takes place. Burn sugar (glucose) to make energy (ATP)

Mitochondria

Double membrane sacs that contain Chlorophyll. It can take light energy and convert it into sugar (glucose) by Photosynthesis.

Chloroplasts (plant cells only: Solar Power)

Chloroplast

Lysosomes (stomach of the cell)

Vesicles(Sacs) filled with digestive enzymes and acid. They break down and recycle old organelles in the cell.

Peroxisomes (poison control for the cell)

Vesicles (Sacs) filled with enzymes that break down toxins in the

cell.

Cytoskeleton (skeleton of the cell)

A net-like framework that gives the cell its shape.

Composed of threadlike proteins called microfilaments, microtubules.

Cytoskeleton

Centrioles (Fishing poles of the cell)

Two small cylinders made of protein microtubules that help the cell divide during mitosis and meiosis.

Centrioles

Cilia (cell movement)

Short hair-like structures that wave and create currents to move fluids past a cell.

Cilia on a Paramecium

Flagella (cell movement)

Long, hair-like structures that move a cell through a fluid.

Flagella

Cell Membrane (fence around the cell)

Semipermeable barrier that controls what enters and leaves the cell

Cell Wall (plant cells only)

Rigid layer of cellulose outside the membrane that supports plant cells.

Cell Wall

Vacuoles (water tower of cell)

•Stores water and dissolved mineral cells. In plants there is one large central vacuole.

Plant Cell Animal Cell

A Cell’s Organelles are like Santa’s Shop

The goal of Santa’s shop is to make toys

The goal of a Cell is to make proteins

DUE TODAY:• Organelle Color WS

DUE NEXT CLASS:• Cell WS

“It’s never to late to be what you might have been.”

George Ellis

Lab Groups

Red

Blue

Yellow

Pink

Green

Purple