Hormones are chemicals that regulate, integrate, and coordinate body systems and functions. The ...

Hormones are chemicals that regulate, integrate, and coordinate body systems and functions. The nurse educator asks a nursing student what the function of the hypothalamus is in the endocrine system.
 
  Which explanation by the student nurse provides the best description? A) The hypothalamus secretes hormones that are transported to target tissues through the circulatory system and directly into the blood stream.
  B) The hypothalamus secretes many hormones, which in turn control the release of hormones by the pituitary gland.
  C) The hypothalamus regulates the amount of calcium and phosphorus in the blood.
  D) The hypothalamus secretes hormones that mimic the action of the sympathetic nervous system.