BIO 3303 Lecture Notes - Lecture 18: Respirometry, Respiratory Quotient, Antoine Lavoisier
30 Aug 2016
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Document Summary
Metabolism: the sum of all chemical reactions in a biological entity. Metabolic rate: the rate of conversion of energy to heat and external work. Respirometry: the ratio of o2 consumption and co2 production used to determine heat production and fuel used. Everything that goes in comes out as work or heat. All animals have different strategies to fuel their crap. Top curve parital pressure of o2 decreasing over time as the animal is exercising. Bottom curve increasing over time as the animal is exercising. Ratio of o2 consumption and co2 production used to determine heat production and fuel used. Metabolic fuel being used is reflected in respiratory quotient (rq) In flight: rq rises to ~1: indicates carbohydrates metabolic fuel (glycolytic pathways) While they"re flying, they"re burning straight carbs. Pacific salmon feed and grow in ocean prior to energetically depleting migration. Fuel used changes throughout migration: rely on internal stores, mobilization of triglycerides from muscle and adipose tissue.
