Stimulus for prolactin release is ?: (A) Dopamine, (B) Hyperglycemia, (C) Sleep, (D) Nipple stimulation
Answer is D. Ans. is'd'i.e., Nipple stimulation[Ref: Human physiology p.383)Prolactin is the only pituitary hormone which is primarily under inhibitory control of hypothalamus .Its secretion is suppressed by dopamine (Prolactin inhibitory substance) secreted by hypothalamus.