Weegy: Hyperthyroidism is the term for overactive tissue within the thyroid gland causing an overproduction of thyroid hormones (thyroxine or "T4" and/or triiodothyronine or "T3"). There are several causes of hyperthyroidism. [ Most often, the entire gland is overproducing thyroid hormone. Less commonly, a single nodule is responsible for the excess hormone secretion, called a "hot" nodule. Thyroiditis (inflammation of the thyroid) can also cause hyperthyroidism.[6] Functional thyroid tissue producing an excess of thyroid hormone occurs in a number of clinical conditions. The major causes in humans are: * Graves' disease. An autoimmune disease (usually, the most common etiology with 50-80% worldwide, although this varies substantially with location- i.e., 47% in Switzerland (Horst et al., 1987) to 90% in the USA (Hamburger et al. 1981). Thought to be due to varying Iodine in the diet ] (More)

Weegy: a. To determine masculine or feminine reproductive traits (More)

Weegy: Proably because all of his bodily fluids went to his brain. Or because he got nervous alot of people get nervous when they see an ex. (More)

Weegy: Exocrine glands are named apocrine gland, holocrine gland, or merocrine gland based on how their product is secreted. Read more: (More)

Weegy: d. To provide a pathway for nerve messages (More)