ch03.1 - Cellular Basis of Life

Whatever its form however it behaves the cell

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and animals alike. Whatever its form, however it behaves, the cell contains all the parts necessary to survive in a changing world. The human body has trillions of these microscopic building blocks. Overview of the Cellular Basis of Life Perhaps the most striking thing about a cell is its or- ganization. If we chemically analyze cells, we find (Objective Checklist, continued) Describe the structure of the plasma membrane, and explain how the various transport processes account for the directional movements of specific substances across the plasma membrane. Describe briefly the process of DNA replication and of mitosis. Explain the importance of mitotic cell division. In relation to protein synthesis, describe the roles of DNA and of the three major varieties of RNA. Name some cell types, and relate their overall shape and internal structure to their special functions. PART II: BODY TISSUES (pp. 85–98) Name the four major tissue types and their chief subcategories. Explain how the four major tissue types differ structurally and functionally. Give the chief locations of the various tissue types in the body. Describe the process of tissue repair (wound healing). PART III: DEVELOPMENTAL ASPECTS OF CELLS AND TISSUES (pp. 98–99) Define neoplasm , and distinguish between benign and malignant neoplasms. Explain the significance of the fact that some tissue types (muscle and nerve) are largely amitotic after the growth stages are over. that they are made up primarily of four elements carbon, oxygen, hydrogen, and nitrogen plus much smaller amounts of several other elements.
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