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प्रश्न
Comment on the role of placenta as an endocrine gland.
उत्तर
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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संबंधित प्रश्न
During the reproductive cycle of a human female, when, where and how does a placenta develop? What is the function of placenta during pregnancy and embryo development?
State the Function of Chorionic Villi
Choose the correct options of the following question:
Eyelids in human foetus separate in :
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
Urine test during pregnancy determines the presence of ______.
The early stage human embryo distinctly possesses ______.
Read the following and answer from given below:
Cleavage is the series of rapid mitotic divisions in the zygote and forms blastula. The 2, 4, 8, 16 daughter cells are called blastomeres. An embryo with 64 blastomeres is known as a blastocyst and has a blastocoel cavity. Blastocyst gets implanted in the uterine wall and leads to preganancy.
The solid mass of cells with 16 blastomeres is called ______
Read the following and answer from given below:
Cleavage is the series of rapid mitotic divisions in the zygote and forms blastula. The 2, 4, 8, 16 daughter cells are called blastomeres. An embryo with 64 blastomeres is known as a blastocyst and has a blastocoel cavity. Blastocyst gets implanted in the uterine wall and leads to pregnancy.
At which stage of embryonic development does trophectoderm develop?
Explain the phases in embryonic development from the morula stage till the establishment of pregnancy in a human female.
Name the type of antibody that can be transferred through the placenta.
