Life functions homeostasis organization
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Life functions homeostasis organization






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    Life functions homeostasis organization Life functions homeostasis organization Presentation Transcript

    • Life Functions/Homeostasis
    • Life Functions1. Transport – Absorb, distribute, and circulate material2. Respiration – Release of energy from food or nutrients3. Reproduction – Production of new organisms4. Regulation – Control and coordination of internal levels, processes5. Synthesis – Small molecules put together to make larger ones; building larger molecules, structures6. Excretion – Removal of metabolic or liquid/gas wastes7. Nutrition – Obtaining and processing food8. Growth – Organisms increase in size or number of cells
    • Metabolism• The sum of all the chemical reactions occurring in your body• All of the life processes and life activities working together
    • Autotrophs vs. Heterotrophs• An autotroph is an organism that can make it’s own food using the sun’s energy – “Autotrophic Nutrition” – Plants, algae, certain bacteria• A heterotroph is an organism that must ingest organic molecules for nutrition – “Heterotrophic Nutrition” – Animals, mushrooms
    • Homeostasis• Maintaining internal balance regardless of external environment – Ex: Temperature, Blood pH, Blood Sugar• Steady state• THINK regulation!• Failure to maintain homeostasis results in death or disease• Viruses, bacteria, fungi and parasites enter organisms and interfere with homeostasis
    • Feedback Mechanisms• Organism’s way to control and regulate internal levels like pH, blood glucose, or temperature; maintain homeostasis – Body’s response to stimuli Ex: heart rate, blood sugar, stomata• Final product in a reaction affects the start of the reaction
    • Insulin decreases the amount of glucose in theblood. The decrease in the level of glucosestops the secretion of the insulin. This describesthe process of1. cellular communication2. synaptic connections3. hormonal synthesis4. negative feedback
    • Those organisms that cannot make their ownfood and must ingest or absorb nutrients areknown as1. heterotrophic organisms2. autotrophic organisms3. bacteria4. macromolecules
    • A person’s breathing rate changes with changesin physical activity. This occurs to meet thebody’s increased demands of oxygen and theremoval of carbon dioxide. What do theprevious statements describe?1. sustaining nutrition2. maintenance of homeostasis3. cellular communication4. hydrolysis
    • What is the combination of all the chemicalreactions in an organism needed to sustain life?1. synthesis2. transport3. metabolism4. regulation