(c) McGraw Hill Ryerson Cells An analogy is a way to understand new ideas by making a comparison. A factory can be used as an analogy for the cell. Parts of the cell that allow the cell to survive are called organelles. Organelles take up about 5 to 30 percent of the cell. The rest of the cell consists of water. See pages How is the Newo colony similar to a factory?

(c) McGraw Hill Ryerson 2007 The cell membrane protects the cell and regulates the movement of particles in and out of the cell.

(c) McGraw Hill Ryerson 2007 Cytoplasm, the jelly-like substance within the cell, contains organelles, water, and other life supporting materials.

The nucleus:  controls all the activities within the cell.  contains deoxyribonucleic acid (DNA). (c) McGraw Hill Ryerson 2007

Nuclear membrane Nuclear pore Nucleolus Nucleoplasm Chromatin

(c) McGraw Hill Ryerson 2007 The mitochondria are the organelles that produce energy in the cell.

Mitochondria Animation/Movie: ondria/index.html ondria/index.html

(c) McGraw Hill Ryerson 2007 Energy in the Cell When the cell changes chemical energy, in the food we eat, to energy the cell can use, it is called cellular respiration. The total of all the chemical reactions that take place in our cells is called our metabolism. See page 26 Cellular Respiration

Proteins are essential for all life and are assembled by the ribosomes. Proteins then pass through the endoplasmic reticulum and are placed in vesicles by the Golgi body. (c) McGraw Hill Ryerson 2007

(c) McGraw Hill Ryerson 2007 Vacuoles are temporary storage compartments.

(c) McGraw Hill Ryerson 2007 Lysosomes break down food particles, cell wastes, and worn-out organelles.

Lysosome Animation: hill.com/sites/ /student_view0/chapter5/a nimations.html# hill.com/sites/ /student_view0/chapter5/a nimations.html#

(c) McGraw Hill Ryerson 2007 The Difference Between Plant and Animal Cells See pages Plant cells have two parts that are not found in animal cells:  Cell Wall  protects the cell and gives cell shape  Chloroplasts  change the Sun’s energy into chemical energy Photosynthesis Locate the cell wall and chloroplast

(c) McGraw Hill Ryerson 2007

Cell Theory See pages The cell is the basic unit of life. All organisms are composed of one or more cells. All cells come from other living cells.

(c) McGraw Hill Ryerson 2007 Prokaryotic and Eukaryotic Cells See page 32 Cells are classified into two groups: Prokaryotic cells have organelles that are not surrounded by membranes. Eukaryotic cells have organelles that are surrounded by membranes. Eukaryotic cells are usually larger than prokaryotic cells.

(c) McGraw Hill Ryerson 2007 Bacteria and Viruses Bacteria are prokaryotic cells. Some bacteria cause diseases such as: tuberculosis and strep throat. Helpful bacteria are used to make food such as: cheese and yogurt. Bacteria are often grouped by the shape of their cells. See pages

Bacteria and Viruses Viruses are not living. HIV, chicken pox, and the flu are examples of viruses. Viruses do not contain any cell organelles but reproduce by using a host cell. Take the Section 1.2 Quiz (c) McGraw Hill Ryerson 2007