What Are The Effects Of Metabolism In Metabolism

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SANA MARRYUM
METABOLISM IN ECTOTHERMS AND ENDOTHERMS;
EFFECTS OF TEMPERATURE
BIO 207 SECTION 4SV3
DECEMBER 7, 2014

LAB INSTRUCTOR
YIJING SHAN

MARRYUM 02
INTRODUCTION

All living organisms require energy to perform their daily life activities. This energy is obtained in the form of ATP by a number of chemical reactions that results in breakdown or building up of different molecules. The sum of all the enzyme-catalyzed reactions inside the body is termed as metabolism. All these reactions are very important in maintaining the physiological functions of the body. The measure of the energy metabolism per unit time is termed as metabolic rate, and it determines the ability of a living organism to sustain life under various conditions. The metabolic rate of an animal at rest under normal conditions is known as the basal metabolic rate. However, it changes when the animal is exposed to different environmental conditions involving temperature, diet, time of the day, torpor etc. Thus, changing metabolic rate is an approach by which living organisms maintain their homeostasis that plays a critical role in enduring life.

Metabolic rate of smaller animals is always higher than the larger animals. This is because it is proportional to the body weight of
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The availability of light affects the circadian clock, which maintains the cardiac function of the animal and hence affect the metabolic rate. “Heart function relies on oxidative energy that is supplied continuously by mitochondria. Because energy demand in the heart varies across the sleep/wake cycle, timely supply of energy may benefit the heart and optimize its function. This time- dependent energy metabolism is subject to the circadian clock system…” (Kohsaka et al., 2014). If the animal were subjected to a constant dark environment, the metabolic rate would increase as compared to the normal

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