A disadvantage of direct calorimetry is thatGroup of answer choicesit is less accurate than indirect calorimetryit cannot be used for measurements of resting energy expenditurethe heat generated by exercise equipment must be taken into accountenergy expenditure during prolonged exercise cannot be measured

Direct calorimetry works because approximately ____% of the energy the body uses, eventually leaves as heat.Multiple choice question.60408020

Indirect calorimetry calculates heat that living organisms produce by measuring either their production of carbon dioxide and nitrogen waste (frequently ammonia in aquatic organisms, or urea in terrestrial ones), or from their consumption of oxygen. Lavoisier noted in 1780 that heat production can be predicted from oxygen consumption this way, using multiple regression. The dynamic energy budget theory explains why this procedure is correct. Heat generated by living organisms may also be measured by direct calorimetry, in which the entire organism is placed inside the calorimeter for the measurement.A widely used modern instrument is the differential scanning calorimeter, a device which allows thermal data to be obtained on small amounts of material. It involves heating the sample at a controlled rate and recording the heat flow either into or from the specimen.

What is the term used to estimate energy expenditure by measuring the amount of body heat released by a person?Multiple choice question.Estimated heat releaseIndirect calorimetryDirect calorimetryEstimated energy requirement

In the 1950’s and 60’s methods of investigating nutritional sciences had improved with the introduction of:Group of answer choicesthe kilojoule as a measurement of energyisotopes and more accurate muscle biopsiesaccurate calorie measuring instrumentsthe basal metabolic rate as a basic measurement of energy expenditure

Which one of the following statements is TRUE? Question 18Select one:a.In the metabolism laboratory class, we used open-circuit, direct calorimetry methods to measure basal metabolic rate.b.The 2nd Law of Thermodynamics states that the Total Internal Energy contained in a glucose molecule is free energy that is available to drive metabolic processes.c.Resting metabolic rate is calculated under strict standardised clinical conditions and determines the amount of energy expended to sustain vital functions when awaked.Direct calorimetry estimates metabolic rate from the amount of O2 consumed and CO2 produced by a living organism.e.The respiratory quotient indicates the type of macronutrient an organism is predominantly metabolising at the cellular/tissue level.