Name two thyroid hormones that affect metabolic rate.

The two thyroid hormones that affect the metabolic rate are thyroxine and triiodothyronine.

Explanation:

The thyroid gland is an endocrine gland, which is present below the Adam's apple, in the neck. The thyroid gland secretes two thyroid hormones and calcitonin.

The thyroid hormones, produced and secreted by the thyroid gland, influence the synthesis of proteins, metabolic rate and development. The two thyroid hormones are thyroxine and triiodothyronine.