Life+Processes-+Part+1-+2020.pptx

Aim: What are the characteristics of life? Do Now: Imagine you are a space traveler who lands on an unknown planet. How could you determine if what you are looking it is alive? Life Functions • • • • • • • • • • Homeostasis Nutrition Transport Respiration Synthesis Growth Excretion Regulation Met...

Aim: What are the characteristics of life? Do Now: Imagine you are a space traveler who lands on an unknown planet. How could you determine if what you are looking it is alive? Life Functions • • • • • • • • • • Homeostasis Nutrition Transport Respiration Synthesis Growth Excretion Regulation Metabolism Reproduction “HNTRSGERMR” (Hunters germer) Homeostasis • Maintaining a stable internal environment in spite of changes in the external environment Nutrition • Obtaining and processing of materials by an organism for its use • Ingestion: food intake by the organism • Digestion: breakdown of complex foods into simpler foods by an organism (ex. Starches  simple sugars) • Egestion: removal of solid wastes/undigested materials Ingestion Digestion Egestion Transport • Absorption of materials through cell membrane • Circulation/distribution of materials to all cells of the organism Transport Human Circulation plant cells Respiration (not breathing!) • Process of releasing energy from organic compounds for use by cells • Glucose is broken down and the energy released is stored in the compound called ATP • Energy released by the compound ATP is used by organisms to perform life functions Respiration • Plants and animals use oxygen from the air to turn food into energy Synthesis • Combining simpler chemical compounds together to form more complex compounds • Example: combining two glucose molecules to make a larger maltose molecule (dehydration synthesis Summary • Homeostasis is when an organism maintains a stable internal environment • Nutrition is obtaining and processing of materials for use by an organism • Transport is absorption, circulation and distribution of materials within an organism Summary • Respiration is the process of releasing energy in the form of ATP from food • Synthesis is combining simpler chemical compounds together to form more complex compounds