IB SEHS CDL 2025 01 13

1. When plotting data on a graph, the independent variable goes on the:

• • X-axis

• • Y-axis

• • Both axes

• • Neither axis

2. During a 400m sprint, which energy system contributes most?

• • Aerobic

• Lactic acid

• • ATP-PC

• Oxidative

Answer explanation

3. Which plane of movement does knee flexion primarily occur in?

• • Frontal plane

• • Sagittal plane

• • Transverse plane

• • Horizontal plane

Answer explanation

4. During anatomical position, the palms of the hands are:

• • Facing backward

• • Facing forward

• • Facing inward

• Clasped together

Answer explanation

5. When measuring heart rate over time, which type of graph would be most appropriate?

• • Pie chart

• • Bar graph

• • Line graph

• • Scatter plot

Answer explanation

6. ATP-PC system can provide energy for approximately:

• • 30 seconds

• • 45 seconds

• • 10 seconds

• • 2 minutes

Answer explanation

7. The primary energy system used in a marathon is:

• • Anaerobic glycolysis

• • ATP-PC

• • Aerobic system

• • Lactic acid system

Answer explanation

8. Which muscle pair works as antagonists?

• • Biceps and triceps

• • Biceps and brachialis

• • Quadriceps and hamstrings

• • Gastrocnemius and soleus

9. Isometric contraction occurs when:

• • Muscle shortens

• • Muscle length remains the same

• • Muscle lengthens

• • Muscle relaxes

10. In a first-class lever, the fulcrum is located:

• • At one end

• • Between effort and load

• • After the load

• • Before the effort

Answer explanation