Practice IB Sports, exercise and health science (SEHS) Topic A.1.3 Transport with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for A.1.3 Transport and mirrors Paper 1A, 1B, 2 style where relevant.
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A bar graph showing the percentage of cardiac output redistributed to different organs at rest and during maximal exercise.
Which option best describes how cardiac output is redistributed during maximal exercise?
The respiratory system exchanges gases to supply oxygen for cellular respiration. The figure shows minute ventilation at increasing exercise intensities. The table shows the tidal volume and breathing frequency of the same person at rest and during heavy exercise.
Figure: Minute ventilation against exercise intensity
Table: Tidal volume and breathing frequency at rest and during heavy exercise
| Condition | Tidal volume (L) | Breathing frequency (breaths min⁻¹) |
|---|---|---|
| Rest | 0.5 | 12 |
| Heavy exercise | 2.5 | 40 |
Using the table, calculate the minute ventilation at rest and during heavy exercise.
Using the table, explain how minute ventilation increases during heavy exercise.
Explain why minute ventilation must increase during exercise.
The table compares structural features of three categories of vessels in the human circulatory system.
| Vessel | Wall Thickness | Relative Lumen Diameter | Presence of Valves |
|---|---|---|---|
| P | Thick | Narrow | No |
| Q | Very thin | Very narrow | No |
| R | Thin | Wide | Yes |
Which of the following correctly identifies vessels P, Q, and R?
How is heat primarily transported from working muscles to the skin during long-distance running?
During exercise, blood flow is redistributed to match the body's changing needs. The figure shows the percentage of cardiac output directed to different regions of the body at rest and during heavy exercise.
Figure: Distribution of cardiac output at rest and during heavy exercise
Using the figure, state the percentage of cardiac output directed to skeletal muscle during heavy exercise.
Using the figure, describe how blood flow is redistributed from rest to heavy exercise.
Explain how this redistribution of blood flow is achieved.
Using the figure, state one benefit of the increased blood flow to the skin during exercise.