01:119:115 Lecture Notes - Lecture 7: Cellular Respiration, Thermodynamics, Emergence

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Stern Cardinale

Document Summary

Metabolism is sum of all chemical reaction of an organism: regulated: maintains homeostasis, an emergent property of life arise from orderly interactions between molecules. Metabolic pathways: begin with a specific molecule and ends with a product; each step is catalyzed by a specific enzyme. 2 types: catabolic pathways, breaking down complex molecules to simpler ones, release energy. Ex: cellular respiration = breakdown of glucose: anabolic pathways, build complex molecules from simpler ones, needs energy. Forms of energy: energy: capacity of cause change, kinetic energy: energy of motion, potential energy: stored energy has not yet been used, heat (thermal energy): random movements of atoms or molecules. Food (calories) organized energy: stored chemical bonds, low entropy and is usable. Heat: disorganized energy: less usable e, cannot perform work, disperses into environment, high entropy. Ultimate source of e radiant e or sun. Cells need to e to do: mechanical work: movement, transport work: active membrane transport, chemical work: breaking bonds.