PPT-Movement of Substances through a Cell Membrane

BIOLOGY Unit 11 Double Award Unit 11 How do s ubstances enter and leave c ells Molecules move quickly and at random from a region of high concentration to low concentration down a . What is the difference between diffusion and osmosis. ?. Objective. Students will be able to describe the movements of substances into and out of cells.. Why is it important?. Understanding the mechanisms of transport across the membrane is important for understanding aspects of physiology.. -. Gateway to the Cell. 2. Photograph of a Cell Membrane. 3. Cell Membrane. The cell membrane is . flexible. and allows a . unicellular. organism to . move. 4. Homeostasis. Balanced. internal condition of cells. and Transport. Cell Membrane. Cell membrane- also called the . Plasma Membrane. Separates the cell from its surrounding . environment.  . Helps maintain homeostasis which is keeping the internal conditions constant. Chapter 3. Cell Membrane. Selectively permeable: allows . some. things to enter and leave. . Cell Membrane. Made of phospholipid bilayer. Cell Membrane. Made of a series of proteins.. https://www.youtube.com/watch?v=moPJkCbKjBs. Chapter 7. 7.1 Cell discovery and theory. The invention of the microscope led to the discovery of cells. .. microscope . Compound Light Microscope. Series of glass lenses. Uses visible light to produce a magnified image. Dolgushin. Harvard SIG 2013. History of Cell Theory. . CITOLOGY. . (. cito. - and –logos-. ) – . the science about the cell. Hooke. , Leeuwenhoek, Schleiden, Schwann, . Virchow. All living things or organisms are made of cells and their . The Nucleus: the gene-containing control center of the cell.. The nucleus is bound by a double membrane called the . nuclear envelope. . . Inside the nucleus are one or more small, dark-staining, essentially round structures called . Learning . Goal . Describe . the composition and function of the lipid bilayer in cell membranes.. Cell Membranes. Cell membranes. . are semipermeable so that nutrients can enter the cell and waste products can leave.. Cellular Basis of Life. Robert Hooke . – late 1600s – observed plant cells. 1830s . Schleiden. & Schwann . – concluded all living things are composed of cells. Rudolf Virchow . – found – all cells come from preexisting cells. Figure 4.13c. Figure 4.13b–c. Gram-Positive Gram-Negative . Cell Walls Cell Walls. Thick peptidoglycan. Teichoic acids. In acid-fast cells, contains mycolic acid. Thin peptidoglycan. No teichoic acids. Recall your work yesterday. When classifying cells, what are the two groups scientists separate cells into? . USING A MICROSCOPE. Light Microscopes and Total Power Magnification. Uses. We can use microscopes to observe cells in greater detail. Recall your work yesterday. When classifying cells, what are the two groups scientists separate cells into? . USING A MICROSCOPE. Light Microscopes and Total Power Magnification. Uses. We can use microscopes to observe cells in greater detail. . The cells that make up the bodies of all but the simplest multicellular animals, both aquatic and terrestrial, exist in an "internal sea" of . extracellular fluid (ECF). enclosed within the integument of the animal. From this fluid, the cells take up O. Cells are Basic to Life . The human body is composed of trillions of cells.. There are about 200 different types of cells. . Each cell turns raw materials from. food . you eat and . air. you breathe into molecules the body needs..