PPT-The Cell Membrane 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 cellregulates the flow of materials into and out of cell. Chapter 2.2. McGraw-Hill Ryerson. Biology 12. (2011). Concentration gradient. Concentration gradient. : difference in concentration between one side of a membrane and the other. Ions and molecules like to move from . -. 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. The Human Body. An IRSC . L. ive Virtual Lesson. By: Diana Lenartiene, Ed. S. . The biological definition of homeostasis is “the tendency of an organism or cell to regulate its internal environment and maintain equilibrium, usually by a system of feedback controls, so as to stabilize health and functioning”. Generally, the body is in homeostasis when it’s needs are met and it’s functioning properly.. (Guyton, 12. th. Ed. (chapter 4): . pg. 45-56) . Dr. . Ayisha. . Qureshi. Assistant Professor, Physiology. ACTIVE TRANSPORT. Definition: . Active . transport is a . carrier-mediated transport wherein . 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 . http://www2.nursingspectrum.com/articles/article.cfm?aid=11971. http://ailil.deviantart.com/art/Osmosis-Jones-Strikes-Back-3678440. Section 1 Vocabulary Pretest. Passive Transport. Diffusion. Concentration gradient. homeostasis. . Cells have different functions.. Homeostasis = stable environment in your body; balance. Your body maintains its homeostasis even if outside conditions are changing. . Levels of Organization. What is the plasma membrane?. A flexible boundary between the cell and its environment which maintains . HOMEOSTASIS. within the cell. **Remember that . HOMEOSTASIS. is a state of balance/equilibrium within the cell.. stable internal environment.. Homeostasis. Homeostasis represents a state of . DYNAMIC EQUILIBRIUM.. Homeostasis. Homeostasis represents a state of . DYNAMIC EQUILIBRIUM.. . This means that adjustments are always being made to keep the variables within an . Plasma membranes :. Membranes. cover the surface of every cell and also surround most organelles within cells. They have a number of functions, such as:. keeping all cellular components inside the cell. Where does the name “cell” come from?. “Cells” were named by Englishman Robert Hooke in 1665.. He observed that cork wood looked like monk’s cells in a monastery.. The Cell Theory. The cell is the basic unit of structure and function.. ASSESSMENT. Complete the chart covering viral vs. bacterial pathogens!. 5 minutes. WHAT IS ONE CRITICAL THING THESE PEOPLE. DO. . IN ORDER TO “PLANK” ON AN OBJECT?. CHECK THIS OUT!!!. THESE PEOPLE ARE CRAZY! . Lec3/cytology . 2021-2022. By: . MSc. . Farah E. . Ismaeel. Objectives of this lecture. Learn about . . cell . membrane . permeability. . . Learn . about . the ways of molecules transport via cell membrane. . Angie C. Romero-Arias . 1. and Ludis Morales . 1,. *. Department of Nutrition and Biochemistry, School of Sciences, Pontificia Universidad Javeriana, 110231 Bogotá, Colombia. * Corresponding author.