CHAPTER THREE – THE CELL

STEM CELLS

BLOOD CELLS PLANT

CELLS

PLASMA CELLS

EMBRYONIC STEM CELLS

CANCER CELLS

Lung Cells.

Lungcells

Lung cells. Cancer lung cells.

Cell membraneWater existBetween theTwo lipidLayers.

Cell membrane

Plasma membrane in Amoeba

CELL MEMBRANES ARE SEMI-PERMEABLE. Some moleculesCan enter and some molecules cannot enter. Energy can enter the cellToo. Protons and electrons can come into and out of the cell. This Movement of CHARGE gives cells an electrical nature. Cells takeAdvantage of this charge to help with cell metabolism.

Water is an important molecule to the cell. Water molecules clusterOr stick together. Water molecules have a positive electric chargeOn one end of the molecule and a negative charge on another endOf the molecule. The Hydrogen molecule has a positive charge and Oxygen has a negative charge. The bond that holds water molecules Together in liquid form is called the Hydrogen bond. Water is a Polar molecule.

Nonpolar molecules have no electric charge.

The cell membrane is made of Phospholipids. The outer edgesOf the membrane are electrically charged. The region betweenThe two layers is neutral. Many food molecules have chargesAnd the charges on the cell membrane help food pass through.

• Cells can be prokaryotic or eukaryotic.

• Inside the cell the CYTOSOL area contains cytoplasm. This is the “GOO” inside the cell.

• Eukaryotic cells have ORGANELLES.

• Plant cells differ from animal cells in that plants have a cellWall. And many plants have Chloroplasts.

Write in the function of:1. Mitochondria:

2. Endoplasmic Reticulum:

3. Golgi Apparatus:

4. Ribosomes:

5. Lysosomes:

6. Nucleus:

7. Vacuoles:

8. Cell Membrane:

9. Chloroplast: