Making Connections NYS Living Environment

During periods of vigorous physical activity, a person’s breathing and heart rates increase. This enables the cells of the body to perform more efficiently because it helps the cells to

• remove waste products faster

• store excess glucose in muscles

• reduce the amount of ATP produced

• convert more oxygen to glucose

Tags

NGSS.HS-LS1-3

NGSS.HS-LS1-7

NGSS.HS-LS2-3

A student is opening and closing clothespins as part of a lab activity. The student begins to experience muscle fatigue, and the rate at which the student is opening and closing the clothespins slows. Which graph best represents the relationship between time and number of clothespin squeezes?

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Students wanted to try PRE to increase their ability to rapidly squeeze a clothespin. They thought if they could do this, they could challenge another class to a clothespin squeezing competition and win. Which steps should the students take to follow the principles of PRE?

• Measure their pulse rate after squeezing the clothespin until fatigued. Then increase the resistance of the clothespin for the next trial.

• Squeeze a clothespin until fatigued, rest, and repeat. Over time, they should gradually increase the resistance of the clothespins they are squeezing.

• Measure their pulse rate, squeeze a clothespin for one minute, rest, and measure their pulse rate.

• Squeeze a clothespin for as long as they can, measure their pulse rate, rest, eat some candy. Increase the resistance of the clothespin for the next trial.

Students following the principles of PRE monitored their ability to lift weights. Which observation would indicate that their exercise program was successful?

• They could eventually lift heavier weights than when they started.

• Their pulse rate increased more rapidly as they kept lifting weights.

• The number of weights their group could lift during competition decreased.

• Males and females could lift the same weight an equal number of times during competition.

Which statement is best supported by the data in the chart?

• After exercise, the nonathletic students had a lower heart rate than the athletic students.

• After exercise, the heart rates of the athletic students returned to resting pulse in four minutes.

• During exercise, both groups of students had the same increase above their resting pulse.

• During exercise, the athletic students had a higher heart rate than the nonathletic students.

To improve the validity of the conclusion reached in this experiment, the students should repeat the experiment

• disregarding any data that don’t fit the hypothesis

• with a larger number of athletes and nonathletes

• comparing the heart rates and breathing rates of males and females

• with the athletes doing different exercises than the nonathletes

Tags

NGSS.HS-ETS1-3

An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin.

Muscle fatigue occurs during the activity described when

• certain waste products collect in the muscle cells

• simple sugar is converted to starch in the muscle cells

• carbon dioxide is used up in the muscle cells

• proteins accumulate in mitochondria in the muscle cells

Tags

NGSS.HS-LS1-7

A student is opening and closing clothespins as part of a lab activity. The student begins to experience muscle fatigue, and the rate at which the student is opening and closing the clothespins slows.

The fatigue the given student feels is due to

• a decrease of metabolic waste products in the

  muscles

• a decrease in the pulse rate of the student

• an increase in the pulse rate of the student

• an increase of metabolic waste products in the

  muscles

Tags

NGSS.HS-LS1-3

In an experiment to determine the effect of exercise on pulse rate, a student checks his pulse rate before and after exercising for several minutes. The purpose of checking his pulse rate before exercising is that it

• is needed to formulate a hypothesis

• is needed to justify the sample size

• serves as a control for the experiment

• serves as the conclusion for the experiment

Which activity most likely corresponds to the pulse rate of the person while sleeping?

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Tags

NGSS.HS-LS1-3