NATS 1675 Lecture Notes - Macromolecule, Cell Nucleus, Monosaccharide
7 Feb 2013
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Document Summary
The human body in the larger world: energy and raw materials. Ecology = the study of interactions between organisms and their environments: abiotic elements = sky, water, atmosphere, etc, biotic elements = animals, plants, etc. Understanding ecological interactions is important because: need to add new molecules to body as old ones get used up, depleted. Raw materials that make up the body (carbon, hydrogen, etc. ) Energy to drive metabolism of incoming food. Water: the new materials come from the environment. Raw physical materials from other animals, the atmosphere, the earth. Organisms get important biological macromolecules through food. Light energy + carbon dioxide + water oxygen + sugars: light is captured and transformed into chemical energy, sugar bonds formed, oxygen is a by-product of glucose formation, plants, algae and certain bacteria carry out photosynthesis. Sugars + oxygen carbon dioxide + water: all cells do this, oxygen is used to break down sugars.
