Biology 2601A/B Lecture Notes - Lecture 7: Heat Transfer, University Of Cape Town, Vasomotor
3 Dec 2016
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Maintain high and stable body temp by using internal heat. High resting mr endotherms have much higher curve than ectotherms (previous lecture); generate more heat. Ectotherms vs endotherms temperature vs metabolic rate. Ecotherms as temp increases o2 consumption will increase exponentially. Endotherm range of temperatures where metabolic rate does not change (thermoneutral zone) basal metabolic rate would be measured in the thermoneutral zone. Below certain point, metabolic rate increase to generate more heat. Above certain temp, metabolic rate decrease to generate less heat. Below tnz is called lower critical temperature (lct) metabolic rate decrease. The slope of that is called minimal thermal conductance => negative linear relationship. M = c (tb ta) metabolic rate equals slope times (body temperature ambient) Animal cannot have a metabolic rate lower than its bmr cannot have 0 metabolic rate. Above the upper critical temperature (uct) the metabolic rate increases.
