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Lecture 7

Lecture 7 - Movement.pdf

22 Pages
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Department
Biology
Course Code
BIO270H1
Professor
Chris Garside

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Lecture 7 MovementNovember 8 2013614 PMMovememtn can be created and produced in ways we may not necesasrily think about Not always made from mysoinmucsle cells BIO270 Page 1 All multicellular organisms can move but animals are the only one who can move from place to palce based on the myosins they are unique because of the organization of the moelcules And use the muscle cells The myosin actin etc These components the actina dn motor proeins can be ofound within the simple fungus as well What really matters is the structural organization the isoforms of the ones in the funguswhich have evoled allowing the production of the superstructuresarcoemre The 3D super structure allows us to really move to place to place This is really a cluster of tissues Which allows us to eb envous of sme animals like the cheetah etc Why is there originally a muscle protein Why did they evolve Why are Should be envious of these there so many different isoformsanimals because of their Therer are couple of reasonssuperstructure As animals grew larger the surface area to volume ratio is reduced 1Diffusion is no longer able to provide materials They are required So you needed largfer animals to eveolve circulatory and respiratory systems to give O2 all the body Along with that you required some compiudnand structure which could pump and develop a force which could move those moelcules The movememnt os animal was knwn wa from water to land 2stimulating evolution of these specific isoforms Q skeletel muscleIs striatedactivated by a nerve impulseHave well developed tubules Skeleton muscles are multi nucleus and found on the periphery moslty due to the fact that there are so many myofibres that the nucleus is pushed to the periphery of the cellBIO270 Page 2
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