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Politics : Politics for Pros- moderated

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Bruce L

To: DMaA who wrote (703276)	2/8/2020 12:51:52 PM
From: skinowski	1 Recommendation of 793685

It’s complicated... :) Like Bill says, much if it is about energy. Trillions upon trillions of times a day the fibers in our muscles contract. How does it happen? It is known that when the chemical composition of a protein changes - it leads to a change in its physical shape. Whenever a certain molecule hooks up to the molecules of Myosin - it’s shape changes. As it does so, it hooks up to some spots on the opposing molecule, Actin - and this makes them actually physically move against each other. Many of them combined will cause muscle contraction. Takes energy to create - and to attach - that molecule to Myosin. Energy - and size. Life is a nano-world - many things occurring at a very small scale. Don’t ask me how it happens that we also think... that’s a tough one... :)

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