25 POINTS!!!!!!Which statement describes the condition of the heart at the point indicated in the electrocardiogram?

A. The atria are contracting and pushing blood into the bottom ventricles of the heart.
B. The ventricles are contracting and pushing blood out of the heart to the lungs and body.
C. The valves between the atria and ventricles close, producing the second heartbeat.
D. The valves of the aorta and pulmonary artery close, producing the second heartbeat.

Answers

Answer 1

Answer:

Answer: Which statement describes the condition of the heart at the point indicated in the electrocardiogram?

The atria are contracting and pushing blood into the bottom ventricles of the heart.

Explanation:

The electrocardiogram is a test that records the electrical activity of the heart. Each beat produces an electrical activity and with an electrocardiograph we can see how that activity is and if there are alterations of the heart rhythm.

The P wave is the first wave of the cardiac cycle. It represents the depolarization of the atria. It is composed of the superposition of the electrical activity of both atria.

Its initial part corresponds to the depolarization of the right atrium and its final part to that of the left atrium.

Answer 2

Answer: the muscles of the ventricles depolorize.

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The nutrient intake level estimated to meet the needs of 50 percent of the individuals in a life-stage and gender group is known asa. recommended dietary allowance.
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Answers

The nutrient intake level estimated to meet the needs of 50 percent of the individuals in a life-stage and gender group is known as estimated average requirement (EAR). Correct answer: D

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In general, what is drug use?A.
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B.
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C.
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D.
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Please select the best answer from the choices provided.

A
B
C
D

Answers

the answer is D.

Hope this helps!!!

Answer:

I may be wrong but i believe its B.The consumption of illegal drugs only.

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Answers

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Answers

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Answers

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cardiorespiratory fitness
muscular fitness
composition

Answers

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