Chapter 2: The Chemical Level of OrganizationObjectivesAfter completing this chapter, you should be able to1.identify, by name and symbol, the principal chemical elements of the human body.2.describe the basic structure of an atom, ion, molecule and compound.3.explain, briefly, how ionic, covalent and hydrogen bonds are formed.4.define the term “chemical reaction,” and explain the basic differences between synthesis, decomposition, exchange and reversible reactions.5.list and compare the properties of inorganic acids, bases, salts and water.6.define the term “pH,” and explain the role of buffer systems in homeostasis.7.compare the structure and functions of carbohydrates, lipids, proteins, DNA, RNA and adenosine triphosphate (ATP).8.describe the characteristics of enzymes, and discuss their functions.Key Words and TopicsMake certain that you can define, and use in context, each of the terms listed below, and that you understand the significance of each of the concepts.1.Identify, by name and symbol, the principal chemical elements of the human body.chemical element26 elements are normally present in your body4 are major elements (constitute 96% of body’s mass)OxygenCarbonHydrogenNitrogen8 others are lesser elements (contribute approximately 3.6%)CalciumPhosphorusPotassiumSulfurSodiumChlorineMagnesiumIron
2.Describe the basic structure of an atom, ion, molecule, compound and free radical.
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- Atom, Chemical bond