The prefix hyper in hyperthyroidism means that the thyroid glands produces excessive amounts of thyroid hormone, and the prefix hypo in hypothyroidism means that the thyroid glands poduces reduced amounts of the thyroid hormones.
A common symptom of both conditions is disruption and change in blood glucose levels.
Normally, glucose crosses over the plasma membrane from the area of high (extracellular space) to low (intracellular) concentration using an integral membrane protein, called: carrier protein. The type of transport where a protein is required is considered a facilitated transport.
Moving glucose from high to low concentration also means that it does not require ATP. This is an example of passive transport.