Wk. 1 Introduction to A&P & Chemistry.ppt - Introductory...

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IntroductionMaintaining LifeHomeostasisFeedback LoopsIntro to ChemistryIntroductory A&PElements & AtomsMolecules &CompoundsChemical BondsChemical ReactionsInorganic vs. Organic
I. IntroductionA. Anatomy & Physiology1. Anatomy – the study of structures & relationships amongthose structures2. Physiology – the study of functions of body parts orbodysystemsB. Hierarchy of body structures1. Atoms – Smallest unit of a pure substance2. Molecules – Combination of two or more atoms3. Cells – The fundamental and functional unit of the body4. Tissues – Group of cells working for a similar function5. Organs – Composed of two or more different tissues6. Organ systems – Group of organs performing a majorfunction7. Organism – Many organ systems working together to form anindependent organism
Figure 1.3Levels of StructuralOrganization of the HumanBodyThe organization of the bodyoften is discussed in terms of sixdistinct levels of increasingcomplexity, from the smallestchemical building blocks to aunique human organism.
II. Maintaining lifeA. Maintenance of boundaries1. Internal environment of the organism orcell must be distinct from the externalenvironment2. The boundary must be selectivelypermeablei. The boundary must permit theentrance of somesubstances while keeping others outii. The boundary must permit the exit certain substances whilekeeping others inB. Movement1. Ability to move the organism or cell from one place toanother2. Ability to move materials into, within, and out of the cell orbodyC. ResponsivenessCell or organism must be able to respond to favorable and unfavorableenvironmental stimuli
D. DigestionBreakdown of nutrients into small molecules that canbe used by body cellsE. Metabolism1. A term for all of the chemical reactions that:i. break down complex chemicalsii. create complex chemicalsiii. produce energyF. ExcretionRemove wastes from the cells or bodyG. Reproduction1. Replacement of cells within the body2. Replace an organismH. Growth - Increase the size of the cell or organism
I. Survival needs1. Nutrients - for energy and building blocks2. Oxygen – for cellular respiration, the chemical process thatreleases energy from energy rich compounds3. Water – required as a medium for chemical reactions4. Body Temperature - so that chemical reactions proceed attheir optimal rate5. Atmospheric Pressure- being able to breath requires theright range of air pressure
III. HomeostasisDefined as the ability to maintain relatively stableinternal conditions even though the externalenvironment is constantly changingA. General characteristics1. Communication between organ systems is required tomaintain homeostasis2. A variable is regulated by using this communicationi. A variable is a condition that changes or varies, suchas body temperature or oxygen concentration of blood

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Term
Fall
Professor
Armacost
Tags
Atom, Chemical bond

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