Which manifestation is expected in a client with hyperthyroidism?

In hyperthyroidism, the body experiences an overproduction of thyroid hormones, which leads to an increase in metabolic rate and various physiological changes. One of the expected manifestations of hyperthyroidism is frequent mood changes, which can include symptoms such as irritability, anxiety, and emotional lability. These mood alterations are associated with the heightened metabolic state and increased levels of circulating hormones that stimulate the central nervous system.

In contrast, sensitivity to cold is often linked with hypothyroidism, where the metabolism slows down, and the body's ability to generate heat diminishes. Constipation is also more characteristic of hypothyroidism, as decreased metabolism can lead to a slowdown in bowel function. Weight gain is typically associated with hypothyroidism as well, due to a reduced metabolic rate leading to less energy expenditure.

Thus, frequent mood changes in a client with hyperthyroidism align with the overall hypermetabolic state driven by excess thyroid hormone activity.