________ is released by the posterior lobe of the pituitary gland in response to a rise in the concentration of electrolytes in the blood, or in response to a fall in blood volume or blood pressure. ________ is released by the posterior lobe of the pituitary gland in response to a rise in the concentration of electrolytes in the blood, or in response to a fall in blood volume or blood pressure. ACTH ADH Oxytocin Somatomedin Thymosin