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Lactation: Definition, Process and Hormones MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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8 Questions around this concept.
Solve by difficulty
Milk secretion in mammals is associated with
The milk produced initially is called
Which of the following hormones stimulates the production of milk in human females?
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The milk produced during the initial few days of lactation is called
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A : Breast-feeding during initial period of infant growth is recommended by doctors for bringing a
healthy baby.
Reason R : Colostrum contains several antibodies absolutely essential to develop resistance for the new
born baby.
In the light of the above statements, choose the most appropriate answer from the options given below:
Given below are three statements each with one or two blanks . Select the option which correctly fills up the blanks in any two statements
A) In human beings , menstrual cycle ceases around 50 years of age ; this is termed as (i) _____
B) The milk produced during the initial few days of lactation is called (i)_____ which contains several (ii)____ absolutely essential to develop resistance for the new-born babies
C) At the completion of the (i)______division the primary oocyte divides into secondary oocytes and (ii)_____
Concepts Covered - 1
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.
- During this phase, suckling is the most effective stimulus that brings about the secretion of prolactin.
- Oxytocin causes the release of the milk from the mammary glands.
- Human milk consists of water, organic and inorganic substances.
- Its main constituents are fats, casein, lactose, mineral salts and vitamins.
- The milk produced initially is called colostrum, which is rich in Iga antibody.
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