1. What is the primary role of scientific evidence when evaluating an athlete's performance?
- A. To make the investigation last longer.
- B. To confirm the athlete's popularity.
- C. To objectively test different explanations.
- D. To create a detailed report for the athlete's fan club to read.
2. A scientist investigating potential cheating in sports might look for a "biological marker." What is the best definition of a biological marker in this context?
- A. The brand of equipment the athlete uses during competition.
- B. A measurable indicator in the body pointing to a biological condition.
- C. A news article written about the athlete's past performances.
- D. The official ranking of the athlete within their sport's governing body.
3. Why is a biological marker considered stronger evidence in a scientific investigation than an eyewitness account of an athlete's training?
- A. Eyewitnesses are usually not experts.
- B. Biological markers are objective and measurable.
- C. It is easier to get a warrant for biological data.
- D. Training regimens are too complex for anyone to observe accurately.
4. Two claims exist for a swimmer's world record: a new training method or a banned drug. What is the most scientific approach to determine the cause?
- A. Disqualify the swimmer as a precaution.
- B. Analyze biological samples for evidence of the drug.
- C. Interview the coach about the new training method.
- D. Measure how much faster the swimmer was than their competitors.
5. What is the main goal when using evidence to investigate potential cheating in sports?
- A. To prove the athlete is more talented than others.
- B. To find definitive proof of artificial enhancement.
- C. To create a public record of the athlete's training.
- D. To show that hard work is not enough to win at the elite level.
6. What is the primary biological process that supplies the energy required for sustained muscle contraction during endurance activities like running?
- A. Nerve impulse transmission
- B. Cellular respiration
- C. Muscle fiber tearing and repair
- D. Protein synthesis
7. If an athlete's performance is limited by the rate of cellular respiration, which two substances are most critical for their muscle cells to receive during an endurance event?
- A. Water and salt
- B. Protein and fat
- C. Glucose and oxygen
- D. Carbon dioxide and lactate
8. According to the principles of exercise physiology, what is the key limiting factor that determines an athlete's maximum endurance?
- A. The total amount of glucose stored in the body
- B. The strength of the athlete's bones and ligaments
- C. The rate at which muscle cells can perform cellular respiration
- D. The speed at which the brain can send signals to the muscles
9. During a long race, an athlete begins to feel fatigued and has to slow down. What is the most direct cellular-level cause for this?
- A. The muscles have completely run out of protein.
- B. The athlete's heart rate has become too slow.
- C. Nerve signals are no longer reaching the muscle cells.
- D. The supply of oxygen to muscle cells is insufficient for their energy demand.
10. A cyclist is competing in a difficult mountain stage. As they push harder, their breathing becomes rapid and deep. What is the primary reason for this physiological response?
- A. To cool down the body by exhaling warm air more quickly.
- B. To increase the intake of oxygen needed for a higher rate of cellular respiration.
- C. To strengthen the diaphragm and intercostal muscles through intense effort.
- D. To reduce the concentration of nitrogen in the bloodstream.