By which of the following names is the Sinoatrial (SA) node in the heart also known as?

Options :
  1. Pace maker
  2. Pace settler
  3. Pace regulator
  4. Pace coordinator
Answer and Explanation :-

Answer: Option 1


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Actually, I jade very quickly. Once is usually enough. Either once only, or every day. If you do something once it's exciting, and if you do it every day it's exciting. But if you do it, say, twice or just almost every day, it's not good any more.
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