What is one potential consequence of not checking for ketones when a student has high blood glucose levels before exercise?

Not checking for ketones when a student has high blood glucose levels before exercise can lead to an increased risk of ketoacidosis. When blood glucose levels are elevated, particularly in individuals with type 1 diabetes or those with insulin deficiency, there is a possibility that the body is not able to utilize glucose effectively and instead begins to break down fat for energy. This process produces ketones as a byproduct.

If ketone levels become excessively high, it can result in diabetic ketoacidosis (DKA), a serious and potentially life-threatening condition. Symptoms of DKA include nausea, vomiting, abdominal pain, breath that smells fruity, confusion, and rapid breathing. Therefore, monitoring for ketones in the scenario of high blood glucose is crucial to prevent this serious complication.

In contrast, other potential outcomes related to exercise such as improved glucose control, hypoglycemia, or lowered insulin sensitivity are not direct consequences of failing to check for ketones in this context.