Question

Which hormone is associated with milk secretion in mammals?
(A) Estrogen
(B) Prolactin
(C) Adrenaline
(D) Growth hormone

Answer 1

Hint: The important aspects of the mammals are the presence of the mammary gland. They produce the milk in order to nourish the young one. This milk is more nutrient and provides immunological strength even to the later part of the life of their offspring.

Complete answer:
This milk production is called lactation. This production mainly starts after the pregnancy. This mammary gland and the milk production occur only in the females in all the mammals except the Dayak fruit bat which has the habitat in Southeast Asia is the male milk producer. These female milk producers have to nipple to feed their young ones except the egg laying mammals. The egg laying mammals lack nipples instead they provide milk through their abdomen.

The process of the maintenance in the milk production is called the galactopoiesis. In this the hormone prolactin helps the mammary gland to produce the milk during the post pregnancy. However, the hormones like estrogen lowers the milk secretion, where the oxytocin helps in the milk ejection reflex for the sucking process. Growth hormone is also similar to prolactin and also indirectly helps in the milk production. Hence the prolactin is the hormone that is solely associated with the milk secretion in the mammals.

Hence the correct answer is OPTION(B)

Note: In addition to the milk secretion, prolactin also helps in the growth of the alveoli in the lungs, increases the growth level and increases the insulin resistance in the body. It regulates the milk secretion through the process of the osmosis in the mammary gland.