BIO 3302 Chapter Notes - Chapter muscle chapter: Hemoglobin, Sarcomere, Phenotypic Plasticity
16 Oct 2017
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Determining the physiological basis of biodiversity in vertebrates. High low oxygen levels, co2, temperature, food, water. Neural control of processes and function in freely behaving animals phylogenetically. Barnacle geese, pink-footed geese, greylag geese and mallard ducks. All closely phylogenetically related --> can see whether the adaptations are due to the homology of the whole group. Better understand how bar headed geese are able to attain high metabolic rates at severe hypoxic conditions. All bred in captivity at sea level and having never flown, 3-5 years old. Under microscope to look at types of muscles. As muscle depth increased, so did the proportion of fast oxidative. Cells lined up end to end with plates in between. Therefore it is the alteration in fibre composition not the change in respiration or the density of mitochondria within muscle cells. All birds raised in captivity having never flown. Bhg had much higher proportion of fast oxidative fibers.
