BSC 2010 Lecture Notes - Lecture 2: Multicellular Organism, Natural Selection, Computational Model
5 Sep 2016
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Document Summary
Second law of thermodynamics: organized entities tend to become more random. (environment likes disorder) > energy is required for organisms to fight the natural tendency to become disorganized. System: is a set of interacting parts (components) in which neither the parts nor the whole can be understood without taking into account the interaction (processes). Characterized by rapid flows of matter and energy. Constantly exchange energy and matter with their surroundings. Even with constant turnover of atoms, molecules, etc, the organization of the system persists. Feedback: the amount one component in a system affects the rate of an earlier process in the system. Positive feedback: occurs when a product of the systems speeds up an earlier process. Negative feedback: occurs when product of the system slows down an earlier process. System analysis: used to understand how biological systems function. system components are identified processes by which the components interact are determined. rates of interactions can be affected by feedback.
