question: Hypersection by an endocrine gland is often caused by what?
distractor3: viruses
distractor1: calcium
distractor2: inflammation
correct_answer: tumor
support: Hypersecretion by an endocrine gland is often caused by a tumor. For example, a tumor of the pituitary gland can cause hypersecretion of growth hormone. If this occurs in childhood, it results in very long arms and legs and abnormally tall stature by adulthood. The condition is commonly known as gigantism (see Figure below ). See Giants - Part 1 - Pituitary Gigantism and Acromegaly at http://www. youtube. com/watch?v=Ebhf1qKVA9A for information about pituitary giants.