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  • Milk secretion in mammals is associated with   Option: 1 vasopressin  Opti

Milk secretion in mammals is associated with 
 

Option: 1

vasopressin
 


Option: 2

progesterone
 


Option: 3

prolactin
 


Option: 4

oxytocin
 


Answers (1)

best_answer

Lactation -

  • The mammary glands of the female undergo differentiation during pregnancy and start producing milk towards the end of pregnancy by the process called lactation.
  • During pregnancy, estrogen and progesterone are secreted in large quantity either from corpus luteum or placenta. 
  • Apart from these, the human chorionic somatomammotropin (HCS) secreted by placenta also is responsible for the growth of breasts. 
  • There is no lactation during pregnancy because progesterone level is high and it inhibits the release of prolactin.
  • After delivery, since the concentration of progesterone falls earlier than the estrogen, prolactin secretion starts and lactation commences in about 1-3 days. 
  • Thus milk secretion is due to prolactin but ejection of milk is due to Oxytocin

Hence the correct option is (c).

Posted by

Deependra Verma

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