Answer:
Neighboring cardiac muscle cells in the walls of heart chambers have specialized cell-to-cell contacts that electrically and mechanically link the cells together, permitting the immediate passage of muscle impulses. These cell-to-cell contacts are called <u>intercalated discs.</u>
Explanation:
Intercalated discs can be described as unique structures present between the cardiac muscles of the heart. The intercalated discs play a major role in making the cardiac muscles contract in a rhythm so that the heart can pump blood in a regular fashion and it hence regulates the effective functioning of the heart. The intercalated discs are the structures that join on cardiac muscle to another and is involved in the transmission of chemical messages between them.
Involuntary as the muscle is a reflex
<span>The 1906 earthquake in California, about 5:12 am on April 18, was before the Richter scale, but scientists estimate it would rank as a 7.8. As much as 90% of the damage in San Francisco was from fires caused by cracked gas pipes. San Francisco burned for three days and nights.
</span>The December 26, 2004 Indian Ocean earthquake located <span>off the west coast of Sumatra, </span><span>Indonesia </span>lasted nearly 10 minutes—the longest on record. <span>
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Answer:
It speeds up the reaction rate
Explanation:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
