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 organization B Life III The Cell A Basic Cell Structure i Plasma membrane Current Lecture II Biology Review A Levels of organization a 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 function i Epithelial ii Connective iii Nervous iv Muscle e 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 Life a At the cellular level life must posses the following characteristics to be considered alive i Metabolism The chemical processes of an organism ii Responsiveness Ability to respond to stimuli iii Movement Movement only has to me minimal just enough to achieve responsiveness iv Growth Becoming larger over time These 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 type vi Reproduction Can be asexual or sexual but must be capable of producing more III The Cell A Basic Cell Structure i Plasma membrane 1 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 hydrophobic c 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 cell
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