BIOB34H3 Lecture Notes - Lecture 3: Biosynthesis, Active Transport, Cell Potency
16 Dec 2016
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Lecture 3: thermodynamics and life on earth (pg. Energy metabolism is the sum of the processes by which animals acquire energy: anabolic processes - that use energy to construct molecules channel energy into useful functions and dissipate energy from their bodies. Energy is the capacity to do mechanical work, measured as the product of force and a system only if the system is not isolated. If energy is permitted to enter a system from outside, order may be maintained or increased within the system. external energy input. Out body does not just repair molecular order, but also creates new molecular order: this law explains why animals need food to reduce our entropy. We need energy input, the blood coursing through an animal"s circulatory system will slow to. Without energy input, vital molecules in an animal"s tissues will become more disorganized via spontaneous breakdown, resulting in molecules losing critical structural and functional properties: energy is the capacity to increase order.
