KIN 321 Study Guide - Final Guide: Myocyte, Intramuscular Fat, Trans Fat
17 Aug 2016
School
Department
Course
Professor
Document Summary
Thermodynamics is broader terms with bioenergetics as a subcategory. Thermodynamics is study of energy change, transfer, efficiency in physical science. Bioenergetics applies thermodynamics to living organisms (biological world) Mechanical vs. biological system: both start with chemical energy, mechanical system produces mech work, heat given off (inefficiency, bio system produces cellular work via atp; however lots of energy lost as heat (75% lost) Temp and rate of rxn show positive, non-linear relationship. 1st law: energy can be neither created nor destroyed; it can only be converted from one form to another. 2nd: exchange is imperfect; some energy will be lost as heat. Concentration of atp is fairly constant; well buffered. Must take muscle biopsy to measure atp levels; take biopsy at rest and during/after exercise. Metabolism: sum of all energy transformations in organism; measured by rate of heat production calorimetry: measurement of heat to determine metabo rate: direct: measures heat production, indirect: measures o2 consumption.
