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Question
Comment on the role of placenta as an endocrine gland.
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Solution
Placenta acts as an endocrine gland and produces the human chorionic gonadotropins, human placental lactogen, oestrogen, progesterone and relaxin (later stages of pregnancy). These hormones support foetal growth and help in the maintenance of pregnancy. Hormones like oestrogen, progestogen, cortisol and prolactin are increased several folds in the maternal blood.
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RELATED QUESTIONS
Gonads develop from embryonic ______.
Which of the following hormones is not a secretory product of human placenta?
The concentration of which of the following substances will decrease in the maternal blood as it flows from embryo to placenta through the umbilical cord?
The human foetus within the uterus
- Oxygen
- Amino Acids
- Carbon dioxide
- Urea
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
Subject 2 has a higher level of hormone B, which is ______
hCG is secreted by ______
Placenta is
Explain the formation of placenta after the implantation in a human female.
Draw a diagram showing human foetus within the uterus and label any four, parts in it.
Explain the phases in embryonic development from the morula stage till the establishment of pregnancy in a human female.
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:
