Biology - Chemical Coordination and Integration Question with Solution | TestHub

The posterior lobe of the pituitary gland, also known as the neurohypophysis, stores and releases two hormones synthesized by the hypothalamus: oxytocin and antidiuretic hormone (ADH or vasopressin).

Oxytocin acts on the smooth muscles of the uterus and stimulates vigorous contractions during childbirth. It also stimulates milk ejection from the mammary glands.

Therefore, the hormone released by the posterior lobe of the pituitary is concerned with the contraction of the uterus.

Answer: Contraction of uterus