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andreyandreev [35.5K]
3 years ago
9

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

Biology
1 answer:
jekas [21]3 years ago
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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A group of adults and students went on a class trip to Washington, DC. The number of male students was 1 more than 7 times the n
Maru [420]
There were A adults, Sm male students, and Sf female students. 
<span> </span>
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3 years ago
What are the main differences between plant and animal cells?
Licemer1 [7]

-Plant cells are more rigid due to the cell wall.

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True or false: The energy contained in the food we eat directly powers all of our cellular activities. If false, please make it
Gwar [14]

Answer:

False

"The energy contained in the food we eat is used to synthesize the energy that directly powers all of our cellular activities".

Explanation:

The food we eat undoubtedly contains energy. This energy is stored in the bonds of the molecules that make up the food. However, the food undergoes the process of digestion to yield glucose (a sugar). This glucose sugar is used in the process of CELLULAR RESPIRATION to synthesize a form of chemical energy usable by cells called ATP.

ATP or Adenosine triphosphate is a molecule that stores chemical energy in living cells. It is the molecule that directly powers all of our cellular activities. Hence, the statement in this question is FALSE. The correct statement should be "The energy contained in the food we eat is used to synthesize the energy that directly powers all of our cellular activities".

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2 years ago
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I think the answer you’re looking for is
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The answer Is B have a good day.
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