BIOL 1070 Study Guide - Final Guide: Winter Flounder, Brown Adipose Tissue, Torpor
5 Dec 2011
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Metabolic rate when expressed as a relative term always has the animal mass included in the units. To increase surface area for exchange, organs such as the lungs have elaborated membranes that may increase the exchange area by 25 fold. The winter flounder survives cold arctic waters in winter but can adjust to slightly warmer ocean temperatures in summer. In the lab, researchers have measured metabolic rate over the seasonal range of temperatures. Brown fat mitochondria contain a special protein, thermogenin, that is not present in white fat cells. In a study conducted recently in norway, researchers found that: lemmings breed in the winter under the snowcover and populations rise as winter continues. It provides an index of how much oxygen uptake or other rate processes change with temperature: hibernation is a period of dormancy that occurs in response to low ambient temperatures and persists for prolonged periods.
