True/False Indicate whether the statement is true or false. 26. The endocrine system's major job is to maintain equilibrium among the organs and systems of the body. 27. Some hormones regulate the release of other hormones. 28. Because it produces hormones that affect the behavior of other endocrine glands, the hypothalamus is called the master gland. 29. During puberty, the thyroid gland begins to shrink. 30. Glucocorticoids help maintain electrolyte balance and regulate blood pressure. Multiple Choice Identify the choice that best completes the statement or answers the question. 31. The hypothalamus, pineal gland, and pituitary gland are located in the A. chest B. throat abdomen D. brain 32. Where are the thyroid and parathyroid glands located? A. Chest B. Throat C. Abdomen D. Brain