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2.3 and 2.4 The Need for Cellular Division and Cell Specialization

2.3 and 2.4 The Need for Cellular Division and Cell Specialization. Text pages 49-53. The Big ideas. Cells are specialized to carry out specific functions. Vocabulary Words. Cell specialization Mucus Hemoglobin villi. 2.3 The need for cell division.

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2.3 and 2.4 The Need for Cellular Division and Cell Specialization

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  1. 2.3 and 2.4The Need for Cellular Division and Cell Specialization Text pages 49-53

  2. The Big ideas • Cells are specialized to carry out specific functions Vocabulary Words • Cell specialization • Mucus • Hemoglobin • villi

  3. 2.3 The need for cell division • Why are we composed of many small cells instead of one big cell? • Two objects with the same volume (amount of space inside) but different shapes have different surface areas • What are the advantages to being small?

  4. What are the advantages to being small? Large surface area (a lot of cell membrane, CM) and a small volume • Messages to travel quicker (nucleus to CM distance) • Use less energy for transportation • Any cell that does a lot of “work” is small • Efficient/good at taking in lots of nutrients and getting rid of waste (more areas to use on CM)

  5. What are advantages of being big? • Do not do a lot of work • More organelles to use • Do not need as many nutrients or produce as much waste (not as active) • Used for storage or structure

  6. What happens when a cell gets to big? • When a cell reaches a certain size, it has made a copy of all of its organelles and it divides into two new cells (mitosis)

  7. 2.4 Cell Specialization • Many different types of cells • Each designed to carry out a specific/special function

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