Chapter1 - Biology 220 Test 1 Chapter 1 Major Themes of Anatomy and Physiology You are expected to read the entire chapter Most of the information

Chapter1 - Biology 220 Test 1 Chapter 1 Major Themes of...

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Biology 220Test 1Chapter 1: Major Themes of Anatomy and PhysiologyYou are expected to read the entire chapter. Most of the information shouldbe a review from Biology 110. Concentrate on the section dealing withhomeostasis, negative and positive feedback mechanisms. The Hierarchy of Complexity the organism is composed of organ systemsorgan systems are composed of organsorgans are composed of tissuestissues are composed of cellscells are composed (partly) of organelles organelles are composed of moleculesmolecules are composed of atomsThe Hierarchy of Complexity (Definitions)organism: single, complete individualorgan system: group of organs with a unique collective function, suchas circulation, respiration, or digestion integumentary,skeletal,muscular,nervous,endocrine,circulatory, lymphatic, respiratory, urinary, digestive, andreproductive systemsorgan: structure composed of two or more tissue types that worktogether to carry out a particular functiontissue: mass of similar cells and cell products that forms a discreteregion of an organ and performs a specific functioncells: smallest units of an organism that carry out all the basicfunctions of life; nothing simpler than a cell is considered alive organelle: microscopic structures in a cell that carry out its individualfunctionsmolecule: particle composed of at least two atomsmacromolecules: largest molecules, such as proteins, fats, andDNAatom: smallest particle with unique chemical identities Homeostasisunderstanding homeostasis is fundamental to understanding how yourbody works physiology: study of how organs (parts of the body) workanatomy: study of the parts of the body
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