Question

The hormone which controls the contraction of uterus after childbirth and also produces lactation in the mammary glands is:
A. Insulin
B. Oxytocin
C. Estrone
D. Estradiol

Answer 1

Different hormones released in the human body plays different roles. The hormone which results in contraction of the uterus released from the posterior lobe of the pituitary gland. Also the hormone which produces lactation in the mammary glands are also released from the pituitary gland.

Complete step by step answer:
To get the correct answer we will see the functionality of every hormones given in options:
A. Insulin: It is a key hormone which helps in adaptations of metabolism ways which are linked to the glucose homeostasis and where the glucose will be stored hence it is an important regulator of glucose metabolism and also of protein metabolism. It is secreted by the pancreatic beta-cell.
B. Oxytocin: The main functions of oxytocin in the body is to contract the womb or uterus during birth of child and lactation in mammary glands. It stimulates the uterine muscles to contract and increase the prostaglandins which increase the contradictions. It acts as an organ in the body and also as a messenger in the brain which controls some important aspects of the reproductive system such as childbirth and lactation. It is produced from the posterior lobe of the pituitary gland. It also plays a role in the initiation of labor.
C. Estrone: It is an estrogen which comes from the ovaries and also from adipose tissues and adrenal glands. It is minor female sex hormone. Its main function is female sexual development.
D. Estradiol: It is one of the important factors in females because it serves several functions in the female body. It mature and maintain the reproductive system. Estradiol hormones increase during menstrual cycle which lead to mature and release of the egg. Also it thickens the uterus lining for the fertilized egg. It is naturally produced in the body.
So, if we see explanations of every hormone we will conclude that only one hormone that is Oxytocin controls the contraction of the uterus and produces lactation in mammary glands.

Note: Key point to be remembered is that Oxytocin results in control of contraction of the uterus and produces lactation in the mammary glands and these hormones are released from the posterior lobe of the pituitary globe. It is released maximum at the time of labor and acts as main facilitator during childbirth.