We then replaced the Tyrode's solution with a low calcium bath. This caused a decrease in tone of contractions. This occurs because the muscles need calcium to contract. The calcium bids to calmodulin, which leads to muscle contraction. So this low concentration causes fewer and less toned contractions. When 20% calcium is added to the solution it enables more calcium to bind to the receptors, thus causing more contractions. However, when we replaced the low calcium bath with a high calcium bath the contractions nearly stopped. This is due to an overload of calcium. There is too much calcium and they are all fighting to bind with the receptors, blocking them and causing none of the calcium to be able to bind.
We replaced the calcium solution with some fresh Tyrode's solution and allowed the intestine to return to normal contractions. We then added 5 drops of cyanide and after about three minutes the contractions stopped. The cyanide inhibits the cell's ability to......

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Title: Tyrode Soulutin
Approximate Word Count: 1719
Approximate Pages: 7 (250 words per double-spaced page)

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