How to Use This Presentation • To View the presentation as a slideshow with effects select “View” on the menu bar and click on “Slide Show”, or simply press F5 on the top row of your keyboard. • To advance to the next slide click the left mouse button once. • From the Chapter screen you can click on any section to go directly to that section’s presentation. • Blank or “missing” areas of a slide will remain hidden until the left mouse button is clicked. • You may exit the slide show at any time by pressing the Esc key Copyright © by Holt, Rinehart and Winston. All rights reserved. Module C: Chapter 2 The Cell in Action Section 1: Exchange with the Environment Section 2: Cell Energy Section 3: The Cell Cycle End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 Exchange with the Environment Bellringer Which of the following best describes a living cell: a) building block b) a living organism c) a complex factory d) all of the above Write a paragraph in your science journal defending your choice. Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 Exchange with the Environment Objectives • Explain the process of diffusion. • Describe how osmosis occurs. • Compare passive transport with active transport. • Explain how large particles get into and out of cells. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 Exchange with the Environment What Is Diffusion? • Diffusion of Water The diffusion of water through cell membranes is so important to life processes that it has been given a special name—osmosis. • The Cell and Osmosis Osmosis is important to cell functions. For example, red blood cells are surrounded by plasma. Plasma is made up of water, salts, sugars, and other particles. The concentration of these particles is kept in balance by osmosis. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 Exchange with the Environment Moving Small Particles • Passive Transport The movement of particles across a cell membrane without the use of energy by the cell is called passive transport. • Active Transport A process of transporting particles that requires the cell to use energy is called active transport. Active and passive transport are shown on the next slide. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 Passive and Active Transport Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 The Diversity of Cells Moving Large Particles • Endocytosis The active-transport process by which a cell surrounds a large particle and encloses the particle in a vesicle to bring the particle into the cell is called endocytosis. • Exocytosis When a large particle leaves the cell, the cell uses an active-transport process called exocytosis. • Exocytosis and endocytosis are shown on the next slide. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 1 Endocytosis and Exocytosis Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 2 Cell Energy Bellringer Make a list of all the different types of cells that you can think of and the jobs they do. Then make a list of all the reasons that a cell needs energy. Write your answers in your science journal. Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 2 Cell Energy Objectives • Describe photosynthesis and cellular respiration. • Compare cellular respiration with fermentation. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 2 Cell Energy From Sun to Cell • What Is Photosynthesis? Plants capture energy from the sun and change it into food through a process called photosynthesis. • Chlorophyll Plant cells have molecules that absorb light energy. These molecules are called pigments. Chlorophyll the main pigment used in photosynthesis, gives plants their green color. Chlorophyll is found in chloroplasts. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 2 Cell Energy Getting Energy from Food • Cellular Respiration During cellular respiration, food (such as glucose) is broken down into carbon dioxide and water, and energy is released. • Connection Between Photosynthesis and Respiration During photosynthesis, cells take in carbon dioxide and release oxygen. During cellular respiration, cells use oxygen to break down glucose and release energy and carbon dioxide. • Fermentation When muscles can’t get the oxygen for cellular respiration, they use fermentation to get energy. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 3 The Cell Cycle Bellringer Biology is the only science in which multiplication means the same thing as division—at least with regards to cells. Explain what is meant by this statement in your science journal. Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 3 The Cell Cycle Objectives • Explain how cells produce more cells. • Describe the process of mitosis. • Explain how cell division differs in animals and plants. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 3 The Cell Cycle The Life of a Cell • Making More Prokaryotic Cells Cell division in bacteria is called binary fission, which means “ splitting into two parts.” Binary fission results in two cells that each contain one copy of the circle of DNA. • Eukaryotic Cells and Their DNA The chromosomes of eukaryotic cells contain more DNA than those of prokaryotic cells do. • Making More Eukaryotic Cells The cell cycle has three stages. In the first stage, the cell grows and copies its chromosomes. In the second stage, the chromatids separate. In the third stage, the cell splits into two. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 3 The Cell Cycle Mitosis and the Cell Cycle • Mitosis Mitosis has four phases that include prophase, metaphase, anaphase, and telophase. • Cytokinesis The division of cytoplasm is called Cytokinesis. End of Slide Copyright © by Holt, Rinehart and Winston. All rights reserved. Chapter 4 The Cell in Action Concept Map Use the following terms to complete the concept map on the next slide: ATP, photosynthesis, oxygen, water, consumers, lactic acid, producers, respiration, energy. Copyright © by Holt, Rinehart and Winston. All rights reserved. Chapter 4 Concept Map Copyright © by Holt, Rinehart and Winston. All rights reserved. Chapter 4 Concept Map Copyright © by Holt, Rinehart and Winston. All rights reserved.