Scientific American Frontiers - Going to Extremes: Frozen Alive (Teaching Guide)
Wood frogs that freeze and winter flounder that don't are the subjects of fascinating research activities. The winter flounder can live in sea water of -1.8 degrees C. The wood frog actually freezes - its heart stops beating and its liver converts glycogen to glucose, thereby lowering the temperature at which ice crystals form and protecting its cells from the ice when freezing does occur. Scientists hope further understanding of these mechanisms might be used to preserve human organs for transplants. The lesson provides two activities, including: - Activity 1: Chill Out - Organic Antifreeze - Activity 2: Cryogenics - The Big Chill.
6, 7, 8, 9, 10, 11, 12, Higher education
Biology, Ecology, Natural History, Process Skills, Histology, Biological And Life Sciences, Body Systems And Senses, Chemistry, Physical Sciences, Meteorology, Earth Science, Geology, Instructional Issues