L10: Energy for Maintenance

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13 Terms

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BMR

Minimal amount of energy required by an endothermic animal each day to maintain homeostasis (in the absence of factors that would affect energy expenditure)

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Factors which would affect energy expenditure include

  1. respiration

  2. circulation

  3. nerve function

  4. cellular maintenance

  5. kidney/liver function


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Basal metabolic heat production =

heat lost to the environment

<p>heat lost to the environment</p>
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What states have lower metabolic rate than BMR

  • sleeping

  • starvation and/or dehydration (prolonged)

  • hibernation

  • torpo


<ul><li><p>sleeping</p></li><li><p>starvation and/or dehydration (prolonged)</p></li><li><p>hibernation</p></li><li><p>torpo</p></li></ul><p></p>
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Placental and marsupial mammals BMRs

  • Certain low metabolic value feeding habits

  • Less cold temperature tolerant

  • Short gestation time


<ul><li><p>Certain low metabolic value feeding habits</p></li><li><p>Less cold temperature tolerant</p></li><li><p>Short gestation time</p></li></ul><p></p>
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BMR of Vertebrate eater mammals

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BMR of invertebrate eater mammals

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BMR of frugivore mammals

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BMR of Nectarivore mammals

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BMR of grazer mamals

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BMR of folivore mammals

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BMR of passerine and non-passerine birds

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How to determine BMR from O2 consumption

BMR (kcal/day) = resting O2 consumption (ml/hr) x 0.0048 (kcal/ml O2) x 24 hrs

1 cm3 of O 2 = 1 ml