PPT-Cell Growth and Size Homeostasis in Proliferating Animal Ce

Amit Tzur Ran Kafri Valerie S LeBleu Galit Lahav Marc W Kirschner Presented by Amber Lin amp Kevin Hu Introduction Models of Cell growth Size Dependence Time Dependence. ANCHORAGE DEPENDENT CELLS . Monolayer. Substrate attachment for growth. Charged substrate. Contact inhibition controls growth. Necessary for cells to spread or divide(mitosis). Determines the nature of the cell. introduction and history of acc . CELL CULTURE…... . In vitro culturing of animal cells, tissue fragment, organ or part of organ under aseptic condition using appropriate media….. ANIMAL TISSUE . Halvor M. Halvorson. 1. , Chris L. Fuller. 2. , Sally A. Entrekin. 3. , J. Thad Scott. 4. , and Michelle A. Evans-White. 1. 1. University of Arkansas Department of Biological Sciences. 2. University of Central Arkansas Department of Biology. Citrus growth stages . Flower bud induction and initiation mid Nov - Feb. Flowering mid February – May . Stage 1 Fruit Growth (cell division) May - June. Stage 2 Fruit Growth (cell expansion) July - Aug. 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. A2 Biology F214. Why do multi cellular organisms need communication . systems?. Organisms need to detect changes in their external environment . . eg. : pressure . on skin. , light, sounds, temperature, . Cells Homeostasis Cells work together to maintain homeostasis . Cells have different functions. Homeostasis = stable environment in your body; balance Your body maintains its homeostasis even if outside conditions are changing. 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—. 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 . A. History of Cells & the Cell Theory. 2. Cell Specialization. 1. 1662-Anton van Leeuwenhoek. First to make and use a compound light microscope. He found tiny living things in water he called “. According to Merriam-Webster homeostasis is “the maintenance of relatively stable internal physiological conditions (as body temperature or the pH of blood) in higher animals under fluctuating environmental conditions; . Biological growth is usually considered as an increase in that part of the living system which is in its own turn capable of growth. . Growth is a permanent increase in size. . The growth of multi-cellular organisms is of three kinds with regard to the growth and multiplication of the body cells.. 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! . Kong, Q. . et al.. . “The Arabidopsis WRINKLED1 transcription factor affects . auxin. homeostasis in roots. .. ”. . Journal of Experimental Botany . (2017) . [DOI. :. . 10.1093/. jxb. /erx275.