Metabolic Rate
Metabolic Rate - Related Videos
04:31
Measurement of Metabolic Rate in Drosophila using Respirometry
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Cited by 49 •
2014
Metabolic disorders are among one of the most common diseases in humans. The genetically tractable model organism D. melanogaster can be used to identify novel genes that regulate metabolism. This paper describes a relatively simple method which allows studying the metabolic rate in flies by measuring their CO2 production.
01:25
Metabolic Rate
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2024
The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities. The Basal Metabolic Rate (BMR) measures the energy expended at rest. Several factors influence the...
10:49
Measuring Rates of Herbicide Metabolism in Dicot Weeds with an Excised Leaf Assay
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Cited by 14 •
2015
This manuscript describes how herbicide metabolism rates can be effectively quantified with excised leaves from a dicot weed, thereby reducing variability and removing any possible confounding effects of herbicide uptake or translocation typically observed in whole-plant assays.
00:52
What is Metabolism?
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2019
Overview Metabolism represents all of the chemical activity in a cell, including reactions that build molecules (anabolism) and those that break molecules down (catabolism). Anabolic reactions require energy, whereas catabolic reactions provide it. Thus, metabolism describes how cells transform energy through a variety of chemical reactions, which are often made more efficient with the help of enzymes. Metabolism Is the Sum of All of the Chemical Reactions That Take Place in an Organism
05:41
Metabolic Profile Analysis of Zebrafish Embryos
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Cited by 42 •
2013
Zebrafish represent a powerful vertebrate model that has been under-utilised for metabolic studies. Here we describe a rapid way to measure the in vivo metabolic profile of developing zebrafish that allows the comparison of different mitochondrial function parameters between genetically or pharmacologically manipulated embryos, thereby increasing the applicability of this organism.
FAQs
Nutrients are broken down through metabolic pathways, and the resulting energy is captured in ATP, the cellular energy currency. ATP then supports cellular activity and physiological function. Consequently, changes in the rate of nutrient processing can alter how much energy an organism uses over time, linking biochemical reactions inside cells with whole-organism energy expenditure.
Hormones can modify the activity of metabolic processes, changing energy use even when an organism’s behavior remains similar. Environmental conditions also influence expenditure, particularly when an organism must respond to temperature or limited resources. These effects make metabolic rate a useful measure for examining how internal regulation and external conditions shape physiological function.
Energy expenditure has several components, including basal maintenance, physical activity, digestion, and thermoregulation. Separating these contributions helps researchers interpret why two organisms, or the same organism under different conditions, show different metabolic rates. A difference may reflect movement, processing of food, basic cellular maintenance, or the energetic demands of responding to temperature.
Comparing metabolic rates under different temperatures or levels of resource availability can reveal how organisms adjust energy use to environmental challenges. Such comparisons help identify patterns of biological adaptation rather than treating energy expenditure as fixed. The results can show how physiological processes respond when maintaining function becomes more energetically demanding or resources become less available.
Measurements allow researchers to compare energy use among organisms and investigate how biological systems allocate energy. These comparisons can reveal relationships between metabolic activity, physiological function, environmental conditions, and resource availability. In biology, the resulting patterns support broader analyses of adaptation and help explain why organisms differ in their energetic demands.
Metabolic rate provides a way to examine how energy use changes during growth, physical activity, or altered health states. Researchers can relate those changes to cellular activity, physiological maintenance, and the energetic demands of exercise. This makes the measure useful for studying organismal function across conditions rather than examining isolated metabolic pathways alone.
At the ecological level, metabolic rate connects the energy processed by individual organisms with the movement of energy through living systems. Comparing energy use among organisms can help researchers examine how biological activity contributes to broader patterns of energy flow. This perspective links cellular nutrient breakdown and ATP production with organismal and ecological processes.