1.1 Introduction to cells

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Mapa Mental sobre 1.1 Introduction to cells, creado por Andrea Tomatis el 24/07/2015.
Andrea Tomatis
Mapa Mental por Andrea Tomatis, actualizado hace más de 1 año
Andrea Tomatis
Creado por Andrea Tomatis hace más de 9 años
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1.1 Introduction to cells
  1. Cell theory
    1. Cells are the smallest unit of life
      1. All living things consist of cells
        1. Cells come from pre-existing cells
        2. Function of life
          1. Homeostasis
            1. Organism's metabolic activities are in a state of balance
              1. Ex : Body temperature
            2. Nutrition
              1. process- living things take in materials from its environment for growth and repair
              2. Growth
                1. Increase in cell size and volume
                2. Reproduction
                  1. living things produce offsrping
                    1. 2 types
                      1. asexual reproduction--one parent and the offspring are identical to the parent
                        1. sexual reproduction--two parents and the offspring is a combination of both parents
                    2. Response
                      1. Action or movement- application of a stimulus.
                      2. Metabolism
                        1. chemical reactions involved in maintaining the living state of the cells and the organism
                        2. Excretion
                          1. Removal of waste products
                        3. Surface area : volume ratio
                          1. Smaller the cells
                            1. High surface area to volume ratio
                            2. Limit cell size
                              1. High ratio
                                1. Function of life - better
                              2. Differentiation
                                1. A less specialized cell develops or matures to become more distinct in form and function.
                                  1. Stem cells
                                    1. Produce cells- pluripotent
                                      1. Affecting cells, organs or tissues.
                                      2. The capacity of stem cells to divide and differentiate along different pathways is necessary in embryonic development and also makes stem cells suitable for therapeutic uses.
                                        1. Therapeutic use of stem cells from specially created embryos, from the umbilical cord blood of a new-born baby and from an adult’s own tissues.
                                    2. multicellular organisms show emergent properties
                                      1. Example: cells form tissues, tissues form organs, organs form organ systems and organ systems form multicellular organisms. Greater than the composition of its parts.
                                        1. For example your lungs are made of cells. Not much use. Many cells working as a unit that allow the lungs to perform their function.
                                      2. Calculation
                                        1. Magnification
                                          1. Size of drawing / size of specimen
                                          2. Actual size
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