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UNCW BIO 240 - Biology Review

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BIO 240 1st Edition Lecture 1 Outline of Last Lecture I. None (No lecture on 1/12, just an introduction to the class)Outline of Current Lecture II. Biology Review A. Levels of organizationB. LifeIII. The CellA.Basic Cell Structurei.Plasma membraneCurrent LectureII. Biology Review A. Levels of organizationa. Chemical  The lowest level of organization. Includes atoms and molecules that are essential for life. b. Cellular components  Mostly cell organelles, or things you find inside the cell. c. Cell  The basic structural and functional unit of life. d. Tissue  Groups of similar cell types working for a common functioni. Epithelialii. Connectiveiii. Nervousiv. Musclee. Organs  Two or more tissue types working for a common function.f. Organ system  The highest level of organization; two or more organs working together for a common function. B. Lifea. At the cellular level, life must posses the following characteristics to be considered alive:i. Metabolism  The chemical processes of an organismii. Responsiveness  Ability to respond to stimuliiii. Movement  Movement only has to me minimal; just enough to achieve responsivenessiv. Growth  Becoming larger over timeThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.v. Differentiation  Cells specializing or changing into another typevi. Reproduction  Can be asexual or sexual; but must be capable of producing more.III. The CellA.Basic Cell Structurei.Plasma membrane1.General characteristics:a.Separates the inside of the cell from the outside of the cell.b.Controls what goes into the cell.c.Is extremely thin (~ 5-10 nm)2.Fluid mosaic model (developed by Singer and Nicholson)a.Phospholipid heads are hydrophilic b.Lipid tails are hydrophobicc.Integral Plasma Membrane Proteins (IPMPs)i.Embedded across the membrane – can form channels.d.Peripheral Plasma Membrane Proteins (PMPs)i.Float from the inside to the outside surface of the


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UNCW BIO 240 - Biology Review

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