Which of these conditions can trigger vomiting?

Gastric distention is a well-known trigger for vomiting as it involves the stretching of the stomach wall. This distension activates mechanoreceptors in the stomach, sending signals to the central nervous system that can initiate the vomiting reflex. The body perceives excessive distention as a potential threat, prompting it to expel the contents of the stomach to relieve pressure and prevent further discomfort or injury.

The other conditions, while having various physiological effects on the body, do not directly trigger the vomiting reflex in the same way that gastric distention does. Blood loss can lead to various responses, but its direct link to emesis is less established. High blood sugar may result in several metabolic changes, but it is not a common initiator of vomiting. Similarly, low blood pressure is associated with fainting or shock rather than triggering the vomiting mechanism directly. Thus, gastric distention stands out as a primary physiological event that can lead to vomiting.