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Notes Biology Life Processes.Notebook September 12, 2017 Notes Biology life processes.notebook September 12, 2017 Welcome to Regents Biology! Mrs. O'Brien Office: 132 Sep 9­12:07 PM What makes something alive? Observe the objects on the lab table. Is it alive? What makes you say so? Make a chart. Write down what you see and your observations. Why is it alive or not? Sep 10­1:31 PM 1 Notes Biology life processes.notebook September 12, 2017 Biology: The study of life, living organisms, and their interactions with other organisms and the environment. Characteristics of Living Things made of cells use energy need water maintain homeostasis in a changing environment react and respond to changes in the environment get rid of wastes that they make (metabolic wastes) their cells contain DNA that can be passed on to the next generation reproduce Interact with and effect the environment and other organisms. populations of organisms change over time (evolve) Sep 10­1:43 PM Life Processes Life processes are biological/cellular activities that maintain homeostasis, keep the organism alive and propagate the species. The life processes are metabolism, nutrition, transport, cellular respiration, synthesis, excretion, regulation, growth & development and reproduction. Sep 10­1:48 PM 2 Notes Biology life processes.notebook September 12, 2017 F 1. Metabolism ­ includes all the chemical reactions that maintain homeostasis. These metabolic (chemical) reactions occur in all the other life processes. Sep 11­9:49 AM Nutrition O The process of obtaining food and processing the food for use by the organism. Two types: Heterotrophic Nutrition Autotrophic Nutrition Producing organic molecules Consuming other organisms or from inorganic molecules pre-made organic molecules. Photosynthesis uses energy Steps: ingestion, digestion, from the sun. absorption, egestion Chemosynthesis uses energy from chemicals (other molecules) Sep 11­12:21 PM 3 Notes Biology life processes.notebook September 12, 2017 F Transport Absorption of materials and movement of materials around inside a cell and inside and organism. Circulation or cyclosis. Sep 11­12:27 PM O Cellular Respiration Releasing ENERGY from food for use by the organism or cell. Two types: Aerobic and anaerobic Sep 11­12:27 PM 4 Notes Biology life processes.notebook September 12, 2017 O Synthesis The metabolic process that combines small molecules to build larger molecules. Small molecules (monomers) are combined (bonded) to form larger molecules (macro molecules) Small molecules Complex molecules Sep 11­12:27 PM Excretion F Getting rid of metabolic wastes Sep 11­12:28 PM 5 Notes Biology life processes.notebook September 12, 2017 Regulation O All activities that involve maintaining homeostasis and allows organisms to respond to changes in the environment. Sep 11­12:28 PM F 8. Growth and Development Getting bigger (increase cell size or cell number) and changes that occur as an organism matures. Sep 11­12:28 PM 6 Notes Biology life processes.notebook September 12, 2017 Why do biology teachers teach us meiosis? O Reproduction Sex Cells! Making new organisms. Two Types: asexual reproduction sexual reproduction Sep 11­12:28 PM What does it mean to maintain homeostasis? You drink when you are thirsty, your urine is more watery when you've consumed more fluid than you need. Organisms must eat regularly. Animals must breathe. They take in O2 and breathe out CO2. Our pancreas secretes insulin into our blood after we eat a meal and secretes glucagon when we haven't eaten for a while. Sep 18­9:12 AM 7 Notes Biology life processes.notebook September 12, 2017 Sep 11­1:12 PM Sep 11­1:12 PM 8.
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