QUESTION: 553 Topic Exam C: Section 3 (science)

The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.

In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.

How long did it take for the heart rate to respond to the initial exercise?

1 minute
45 seconds
30 seconds
15 seconds

Answer(s): D

Explanation:

The exercise started at the beginning of the 1 minute and by a quarter of a minute later (60 divided by 4 = 15 seconds) the heart rate started its steep incline.

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QUESTION: 554 Topic Exam C: Section 3 (science)

The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.

In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.

Which of the following is an accurate pattern found in Graph 1?

The recovery time is shorter than the time it took for the heart rate to peak, due to the increase in exercise.
The recovery time is longer than the time it took for the heart rate to peak, due to the increase in exercise.
The recovery time is equal to the time it took for the heart rate to peak, due to the increase in exercise.
The recovery time was equal to the resting heart rate time.

Answer(s): B

Explanation:

The total time for the heart rate to reach its peak height was 1 minute 15 seconds, while the total time for the heart rate to go through recovery time was about 1 minute 30 seconds.

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QUESTION: 555 Topic Exam C: Section 3 (science)

The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.

In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.

Which of the following statements is true?

I). During exercise the blood needs to carry fewer nutrients throughout the body.
II). The body does not need any nutrients when at rest.
III). Waste is carried away from cells only during exercise.
IV). During exercise the blood needs to carry more nutrients and wastes throughout the body.

I and III
III only
II and III
IV only

Answer(s): D

Explanation:

According to the text above Graph 1, the heart rate increases or decreases depending on the body's need to transport waste and nutrients. Therefore during exercise, the heart rate increases in order to transport more of these materials.

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QUESTION: 556 Topic Exam C: Section 3 (science)

The heart is an organ that pumps blood throughout the circulatory system in the body. Red blood cells are a tissue in the body that carry nutrients to the body's cells and waste away from the body's cells. The heart rate increases or decreases depending on the body's needs to transport nutrients and waste.

In an experiment, a female had her heart monitored. For one minute, she sat in a chair quietly. At the end of the first minute to the end of the third minute she did jumping jacks. Finally, she sat again in the chair and waited until her heart rate went back to her resting heart rate as measured in the first minute. After performing this experiment, the following graph was created.

Using the data in Graph 1, what will the heart rate be in the 8th minute if the person continued to rest?

The heart rate will be above the initial resting heart rate.
The heart rate will be at about the same as the initial resting heart rate.
The heart rate will be below the initial resting heart rate.
The heart rate will be falling at a faster rate than during the resting period after exercise.

Answer(s): B

Explanation:

As seen in Graph 1, the heart rate decreased until it returned to the initial resting heart rate. Because the participant was continuing to rest, the heart rate would reflect that of a resting period.

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QUESTION: 553 Topic Exam C: Section 3 (science)

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QUESTION: 554 Topic Exam C: Section 3 (science)

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QUESTION: 555 Topic Exam C: Section 3 (science)

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QUESTION: 556 Topic Exam C: Section 3 (science)

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