The sa node acts as the pacemaker of the heart because these cells are __________.

1 answer:

5 0

The heartbeat has two specialised areas of muscle (the sa node and the av node) that control and synchronise the heartbeat. The rhythm of relaxation and concentration of the pacemaker sets the rythym of the heartbeat.

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After gaining electron Chlorine becomes an anion.

and it's symbol is. 

${Cl}^{ - }$

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The answer to this question would be hydrolysis

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NNADVOKAT [17]

The purple color of potassium permanganate gradually spreads throughout the water in the jar by the process of diffusion.

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The concentration of potassium permanganate is higher at one point and the other regions in the jar have its nil or low concentrations initially, this leads to the set up of a concentration gradient.
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Know more about diffusion

brainly.com/question/14852229

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What is the best reason to color-code a map?

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I'd say to help the reader quickly locate geographic regions.

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