BIO 2135 Study Guide - Microvillus, Zygote, Globular Protein

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11 Jul 2014
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Group of single celled organisms with animal-like characteristic. Typically seen as pre-cursors of animals that exist. Maintain water and salt balance: you must have a certain salinity within cells. Marine environment is easiest environment to live in because the cells are isotonic to water around it. When we move into fresh water environment, cells are hypertonic to freshwater outside. In terrestrial environment we must water proof to prevent water loss. Obtain oxygen: oxidative phosphorylation, mitochondrial cycle-need atp, must absorb from environment around. Remove metabolic waste: metabolism- when it burns organic compounds they often have nitrogen molecules in them. Take organic chemical compounds and break them apart to gain energy, if energy is from amino acids they must be deaminated, the key process of metabolism is this removal of nitrogen. Nitrogen is extremely toxic, ammonia has the potential to completely shut down the krebs cycle at any particular level. Ammonia is an extremely dangerous waste if it accumulates to any degree.