Two girls on a track team recorded their heart rates before, during and after a short exercise.
Use the graph below and what you know about the human body and homeostasis to answer the questions that follow.
What is being measured in the graph shown above?
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Question 2
What is Austyn's heartrate before exercising? (1 point)
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Question 3
What is Shanice's heart rate before exercise?(1 point)
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Question 4
Identify Austyn's highest heart rate. (1 point)
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Question 5
Identify Shanice's highest heart rate.(1 point)
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Question 6
Which minute shows both girls' peak heart rate?(1 point)
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Question 7
Describe in 1-2 sentences, what happens to the heart rates between the second and third minutes.(2 points)
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Question 8
Are the girls exercising more or resting during minutes nine and ten? Justify your answer in 1-2 sentences. (2 points)
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Question 9
Explain how the graph demonstrates homeostasis with at least 3 sentences. Be sure to include specific data from the graph. (4 points)
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Question 10
Why is it important for heart rate to increase during exercise? Answer in 3-5 sentences. (4 points)
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The graph is measuring heart rate.
Austyn's heart rate before exercising is 80 beats per minute.
Shanice's heart rate before exercise is 72 beats per minute.
Austyn's highest heart rate is 152 beats per minute.
Shanice's highest heart rate is 148 beats per minute.
Both girls' peak heart rate occurs in the third minute.
Between the second and third minutes, the heart rates of both girls increase.
During minutes nine and ten, the girls are resting. This can be justified because their heart rates decrease and return to their resting heart rates.
The graph demonstrates homeostasis by showing how the heart rates of both girls return to their resting heart rates after exercise. For example, Austyn's heart rate increases from 80 bpm to 152 bpm during exercise but returns to 80 bpm after resting. Similarly, Shanice's heart rate increases from 72 bpm to 148 bpm during exercise but returns to 72 bpm after resting. This shows that the body is able to maintain a stable heart rate despite changes induced by exercise.
It is important for heart rate to increase during exercise because it allows for a greater supply of oxygen and nutrients to the muscles. As exercise intensity increases, the muscles require more oxygen to produce energy. The increased heart rate ensures that oxygen is delivered to the muscles in a timely manner. Additionally, an increased heart rate helps remove waste products, such as carbon dioxide, from the muscles. Overall, an increased heart rate during exercise supports efficient energy production and waste removal, enhancing exercise performance.