Final answer:
Histamine plays an important role in vomiting caused by motion sickness. The area postrema in the brain, which is responsible for vomiting, responds to conflicting signals from the visual and vestibular systems during motion sickness. Histamine can bind to H1 receptors that may contribute to the initiation of emesis in response to such conflicting signals.
Step-by-step explanation:
Histamine plays an important role in vomiting caused by motion sickness. True. Motion sickness is the result of conflicting information from the visual and vestibular systems. When motion is perceived by the visual system without the complementary vestibular stimuli, or through vestibular stimuli without visual confirmation, the brain stimulates emesis (vomiting) and associated symptoms. The area postrema, which is responsible for vomiting, is connected to the autonomic system and can trigger a similar response to motion.