The Comparison of Thermoregulation and Metabolism in Mus Musculus and Gromphadorhina Portentosa

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The comparison of thermoregulation and metabolism in Mus musculus and Gromphadorhina portentosa Hans Rosales Department of Biological Sciences California State University San Marcos, San Marcos CA 92096 Abstract

Thermoregulation is an organism’s capability to maintain its body temperature and metabolism is the process in which energy is transformed within an organism’s body to maintain life. CSUSM comparative animal physiology students contained mice (Mus musculus) and Madagascar hissing cockroaches (Gromphadorhina portentosa) in vacuum tight contains to measure O2 consumption which would then translate into the mass specific metabolic rate (MSMR). With the comparison between mice in room and cold temperatures, mice held in cold temperatures had a higher MSMR (t= 3.23, df= 16, p= 0.005). The MSMR of cockroaches held in cold temperatures resulted higher than cockroaches at room temperature (t= 1.87, df= 15, p= 0.081). Also, the mice held at both temperatures had a higher MSMR than the cockroaches at both temperatures. Since mice are endotherms, they would have a higher metabolic rate at colder temperatures due to increase consumption of O2 to produce heat and cockroaches would have lower metabolic rates because they are ectotherms and have a higher heat conductance. Introduction

Metabolism is the chemical reactions in which an organism utilizes energy to maintain life. Since glucose is a main source of energy, organisms use glucose along with oxygen to produce carbon dioxide, water and heat (Randall et al; 2002). Knowing this, metabolism can be measured by the production of CO2 or the consumption of O2. This is called indirect calorimetry (Randall et al;...
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