Which of the following is a possible effect of glucocorticoids?

Glucocorticoids, a class of steroid hormones produced by the adrenal cortex, have several physiological effects on the body. Among these, one notable effect is fat deposition. Glucocorticoids can promote the mobilization of fats and their subsequent deposition in certain areas of the body, particularly the abdomen and face. This redistribution of fat can lead to conditions like Cushing's syndrome, where patients exhibit abdominal obesity, a "moon face," and other signs.

Understanding the other options helps clarify why they do not represent possible effects of glucocorticoids. Increased potassium excretion is often associated with glucocorticoid use due to their mineralocorticoid effects, but fat deposition is a more direct and characteristic effect. Decreased glucose production is not typically observed; in fact, glucocorticoids often increase glucose production, raising blood sugar levels. Lowering of blood pressure is generally not a result of glucocorticoid activity, as these hormones can actually lead to increased blood pressure due to fluid retention and enhanced vascular responsiveness.

Therefore, fat deposition accurately reflects one of the significant metabolic actions of glucocorticoids in the body.