Lesson Worksheet: Effects of Exercise Biology

In this worksheet, we will practice describing the effect of exercise on the body, and outlining practical experiments to investigate this.

Q1:

When a person exercises, the muscle cells in their body require a large amount of energy. What biological process happens in the cells to provide this energy?

  • ATranslocation
  • BRespiration
  • CMitosis
  • DVentilation
  • EPhotosynthesis

Q2:

The graph provided shows the relationship between heart rate and exercise.

Which of the following conclusions about the graph is correct?

  • AThe average heart rate is higher when a person is exercising moderately than when a person is exercising intensely.
  • BThe average heart rate is lower when a person is exercising intensely than when a person is exercising lightly.
  • CThe average heart rate is lower when a person is recovering from intense exercise than when a person is at rest.
  • DThe average heart rate is higher when a person is exercising intensely than when a person is exercising lightly.

Why do we see this trend?

  • AThe heart beats at the same rate from rest to intense exercise to ensure blood flow remains constant.
  • BDuring intense exercise, the heart beats faster to supply the brain with more blood.
  • CDuring intense exercise, the heart beats faster to supply the muscles with more oxygen and glucose.
  • DDuring intense exercise, the heart beats slower to allow the exchange of oxygen into muscle cells.

Q3:

Stores of glucose can be used to provide energy for intense exercise. What insoluble compound stored in the liver can be broken down to release glucose?

  • ALactic acid
  • BGlycogen
  • CStarch
  • DInsulin
  • EGlucagon

Q4:

A student wants to investigate how doing different numbers of push-ups affects the heart rate of different people. They ask for 15 volunteers to collect results from.

What will the control variable for this experiment be?

  • AThe number of push-ups
  • BThe type of exercise
  • CThe mass of the volunteers
  • DThe time taken to do the push-ups

Which of the following is a method the student can use to increase the validity of their results?

  • AUse a group of 15 people of a wider age range
  • BUse a heart rate monitor rather than take the volunteer’s pulse
  • CRepeat the experiment for a longer period of time
  • DRepeat the experiment with sit-ups

Q5:

A group of students are investigating the effect of exercise on heart rate. Their method is as follows:

  1. Select a sample of volunteers.
  2. Take each volunteer’s resting heart rate.
  3. The volunteers jog on the spot for 1 minute.
  4. Take the volunteers’ heart rates immediately after the exercise.
  5. The volunteers sprint for 20 seconds.
  6. Take the volunteers’ heart rates immediately after the exercise.

How could the students improve the accuracy of their results?

  • ABy asking the volunteers to jog for a longer period
  • BBy making sure only one variable is changed
  • CBy repeating the experiment with different groups of students
  • DBy repeating the experiment three times and calculating average heart rates

How could the students extend their experiment to investigate recovery times?

  • ABy recording how long it takes for breathing rates to slow down
  • BBy timing how long it takes for the volunteers’ heart rates to return to resting
  • CBy including another period of exercise after the sprinting
  • DBy testing the volunteers’ blood for the presence of lactic acid

Q6:

Practical activities can be used to investigate the effect of fitness on heart rate. How can heart rate be easily measured?

  • ABy measuring the volume of oxygen taken in
  • BBy measuring the volume of blood that leaves the heart
  • CBy taking someone’s pulse
  • DBy recording the number of breaths per minute

Q7:

What scientific term is given to the volume of oxygen needed after exercising to break down lactic acid?

  • AAerobic deficit
  • BOxygen repayment
  • COxygen deficiency
  • DAerobic debt
  • EOxygen debt

Q8:

What type of blood vessels allow oxygen and glucose in the blood to diffuse into body cells?

  • AVeins
  • BCapillaries
  • CArteries

Q9:

What is the product of anaerobic respiration in human body cells?

  • ACarbon dioxide
  • BLactic acid
  • CEthanol
  • DWater

Q10:

During intense exercise, muscle cells may require more oxygen for cellular respiration than can be supplied to them. If so, what type of respiration will occur?

  • AAerobic
  • BEthanol fermentation
  • CAnaerobic

This lesson includes 10 additional questions and 3 additional question variations for subscribers.

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