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Ad libitum [116K]
3 years ago
7

Begin by considering a relaxed muscle. In this state, the myosin molecules of the thick filaments are not in contact with the ac

tin of the thin filaments, and ADP and Pi are bound to the myosin heads. An action potential on the muscle cell plasma membrane initiates contraction of the sarcomeres from this relaxed state.
Biology
1 answer:
inna [77]3 years ago
8 0

Answer:

Three different types of muscles are cardiac muscle, smooth muscle and skeletal muscle. The movement of muscle require the protein like actin, myosin and troponin.

The contraction and relaxation of muscle occurs in the sequential events.The cross bridge formation occurs by the myosin head with actin. The inorganic phosphate is released by myosin. The actin is pulled by myosin towards the sarcomere center. The binding of ATP with myosin occurs. The actin and myosin cross bridge breaks and the hydrolysis of ATP occurs by myosin. Finally, the extension of myosin heads.

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2 years ago
Three genes control the production of tail structures in dogs. The wag1 gene promotes the production of tail structures. However
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Answer:

1. <u>ntrdr</u> --><u> brken</u> --|  <u>wag1</u>  --> <u>Tail structures </u>

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(1) In this experiment three different genes are present;

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      2) brkn gene - inhibits Wag-1 which leads to inhibition or inactive Wag1 gene and there is no tail formation.

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(2) The ntrdr gene stimulates the brkn gene and active brkn gene inhibits the wag-1 gene. As we know Wag1 gene is essential for tail formation. on removing out ntrdr gene result in inactive gene brkn thus allows the expression of the Wag-1 gene allowing tail growth in dogs.

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