Which statement about glands and hormones is true?
◦ The posterior pituitary produces melatonin, which helps regulate biological rhythms.
◦ The pineal gland is the master control center of the endocrine system.
◦ The hypothalamus is an endocrine gland responsible for producing the hormone calcitonin.
◦ The anterior pituitary produces multiple hormones that affect activity of other endocrine glands and cells of the body.