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Q78 - Cortisol and 2-AG Dynamics During Motion-Sickness-Inducing Flight

Theoretical B Real exam question - full text reproduced under IBO's CC BY-NC-SA 4.0 license
Endocrine System Physiology

Some researchers studied the changes in the level of saliva cortisol and 2-AG (2- arachidonoylglycerol) concentration in blood in two groups of people with motion sickness and without motion sickness (no sickness) during parabolic flight maneuvers (PFs). During PFs, the saliva cortisol levels and 2-AG blood concentrations were measured from samples taken in-flight before start of the parabolic maneuvers (T0), after 10 parabolas (T1), 20 parabolas (T2), and 30 parabolas (T3), termination of PFs (T4) and 24 h later (T5). The results are shown in Figure Q.78.

Figure Q.78

Figure 1. Figure 1.

Using the information and data, determine which of the statements are true or which are false.

A. A 2-AG inhibitor can be used to reduce motion sickness.
B. In motion sickness group, the blood glucose level at T4 was higher than at T1.
C. At T2, the blood ACTH (adrenocorticotropic hormone) level in the no sickness group was higher than that in the motion sickness group.
D. In motion sickness group, the blood CRH (corticotropin-releasing hormone) level at T5 was lower than that at T2.
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Question reproduced from IBO 2016, Theoretical Paper B, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)