Unit 3: Characteristics of Life, Life Processes , Levels of Organization

characteristics of Life:Cells
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Terms in this set (47)
Which Life activity is not required for the survival of an individual organismreproductionDuring a race, the body temperature of a runner increases,. The runner responds by perspiring, which lowers body temperature. This process is an example of ..maintenance of homeostasis- constant internal environmentwhich process is represented by the arrow in the diagram below energy stored in food ----> Energy available for use by living organishmrespirationWhich life process is classified as autotrophic in some organisms and heterotrophic in other organisms?nutritionWhich process best describes the process of asexual reproductions?it occurs without the fusion of nucleiHow are the energy demands of a cell or an organism met?The energy demands of a cell or an organism are met as a result of interactions between several life functionsIdentify two life functions involved in meeting the energy demands of a cell or an organismrespiration and nutritionExplain how these two life functions interact to make energy availablenutrition provides food energy that is broken down during respirationAutotrophs (Nutrition)make their own food; self-feeders auto=Self "troph" = fedder ex. Plants --> PhotosynthesisHeterotrophsget food from environment ex. Animals; fungiSynthesisTo build *combining joining of simple substances to form complex substances ex; dehydration synthesis--> building protein synthesis --> joiningRespirationThe process that releases energy from food. release of energy from glucose ATP= energy moleculeaerobic (respiration)requires O2 *mitochondriaanaerobic (respiration)does not require O2Excretionremoval of waste from an organism/cell (cell membrane) ex. CO2 urine (water, salt, urea)transportmovement & circulation of materials within a cell or between cells Ex. cell -->cytoplasm (cyclists)multi-cellular organism (transport)circulatory systemOrganMade of similar tissues that work together to perform a specific activityRegulationto monitor/keep in check Any process that regulates the frequency or rate of any biological process, quality or function.nervous (regulation)(impulse) electrical messages allow you to respond ex. brain, spinal cord, nervesendocrinechemical messages ex. glands -->secrete hormonesmetabolism*sum (all) life processes occurring in cells all the time *helps to main HOMEOSTASISCell division reproductionnecessary for species to survive NOT the individual*Mitosisproduces 2 identical daughter cellsAsexualOccurs in bodyMEIOSISproduces 4 different gametes = > sex cellsSex cellsThe male sex cells are sperm, while the female sex cells are eggs.Organ SystemGroups of one or more organs working together to perform functions of the organism.OrganismEntire living thing that carries out all basic life functions. Something that has all the characteristics of life.TissuesCells that work together to perform a specific function.Cell membraneSurrounds the cell and keeps it together; controls the substances passing into and out of the cell.MicroscopeAn instrument used for viewing very small objects, typically magnified several times.MicrobeA microorganism, especially a bacterium causing disease or fermentation.SpecializedTo be adapted to a special function or environment.StructureAn arrangement or organization of parts to form an organ, system, or living thing.MoleculesA grouping of two or more atoms joined together.NucleusThe control center of the cell. It directs all the cell's activities.

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