Which of the following statements is correct in relation to the endocrine system?

• A. Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones.
• B. Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messenger are known as hormones.
• C. Releasing and inhibitory hormones are produced by the pituitary gland.
• D. Adenohypophysis is under direct neural regulation of the hypothalamus.