PPT-Membrane Function and Cell Communication

Summary How do materials get across a cells membrane It depends on the type of substance Summary Nonpolar materials or hydrophobic materials do cross easily especially if small Ex CO. Chin Wei Lim, PhD student. 1. Professor . Vassili. Toropov. 1,2. 1. School of Civil Engineering. 2. School of Mechanical Engineering. cncwl@leeds.ac.uk v.v.toropov@leeds.ac.uk. Faculty of Engineering. 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. Cell Membrane and Cell Wall:. . ALL. . cells have a . cell membrane. made of . proteins. and . lipids. . Cell Membrane. lipid bilayer. protein channel. protein . pump. Layer 1. Layer 2. SOME. cells have cell membranes . Cell Membrane and Cell Wall:. . ALL. . cells have a . cell membrane. made of . proteins. and . lipids. . Cell Membrane. lipid bilayer. protein channel. protein . pump. Layer 1. Layer 2. SOME. cells have cell membranes . Homeostasis & Cellular Transport. Function of the Cell Membrane:. Cell membrane separates the components of a cell from . its . environment. —surrounds the cell. “Gatekeeper” of the cell—regulates the flow of materials into and out of cell—. Key Points:. Structure (and importance) of . cell membrane. Structure (and function) of . organelles. Interconnections between cells. . to maintain structural stability in body tissues.. A . typical cell. Cell Membrane. .. The cell membrane . Controls. what comes out and . in of the cell. . It also provides protection.. The composition is a double layered sheet called a . Bi-lipid layer. .. This lipid bi-layer is made up of two . Section 7.1 Summary – pages 171-174. The . cell theory. . is made up of three main ideas:. All cells come from preexisting cells.. The cell is the basic unit of organization of organisms.. Unit Objectives. 1: Explain the structures of plant cells and important cell processes.. a. Describe the structures of a typical plant cell and their functions.. b. Compare and contrast mitosis and meiosis.. Structure. Main component is phospholipids that are arranged in a double layer (. bilayer. ). Has scattered proteins within the phospholipids. Regulate what enters/leaves cell. Function . Nucleus. Structure. Function of the Cell Membrane:. Cell membrane separates the components of a cell from . its . environment. —surrounds the cell. “Gatekeeper” of the cell—regulates the flow of materials into and out of cell—. organelles. . .  . A. The cell membrane provides . protection. and support for the . . cell. . Animal . cells . do not have a cell wall, therefore, the cell . membrane . must provide . 1. Cell Membrane. 2. Cytoplasm. 3. Nucleus / Nuclear Membrane. 4. Nucleoplasm. 5. Nucleolus. 6. Chromosomes. 7. Vacuole. 8. Ribosomes. 9. Rough Endoplasmic. Reticulum. Lysosome. Organelles Found in a Generalized Animal Cell. Much larger than prokaryotic cells having two enveloped systems. True cells occurring in plants and animals . Though they have different shape size and physiology but all cells are typically composed of plasma membrane cytoplasm and its organelles i.e. mitochondria, endoplasmic reticulum .