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Leona [35]
3 years ago
5

The first cells to initiate an electrical signal in the heart is the

Biology
1 answer:
Lady_Fox [76]3 years ago
3 0

Answer:

Answer is Sinoatrial node, SA.

Explanation:

The sinoatrial node, SA, is known to be a group of cells which are found at the top of the heart.

The electrical signal that is initiated by the sinoatrial node bring about or stimulates the atria and then the ventricle of the heart.

It should be noted that, the sinoatrial node are regarded as the pacemaker cells.

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B.) Marshmallows catching fire. 
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According to the __________ trend, the head develops more rapidly during the prenatal period than the lower part of the body. Gr
nasty-shy [4]

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<h3>What is Cephalocaudal trend?</h3>

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This is therefore the reason why option B was chosen as the most appropriate choice.

Read more about Cephalocaudal trend here brainly.com/question/9562393

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2 years ago
Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant. She hypothesizes that a pl
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2 years ago
An ecosystem consists of a community of living organisms
miss Akunina [59]

Answer:

1. interactions

2. environment

3. sun

4. photosynthesis

5. chemical

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13. second

Explanation:

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3 years ago
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Korolek [52]

Answer:

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Explanation:

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3 years ago
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