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Which cells of the blastocyst are responsible for the development of the embryo?

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Important Questions on Human Reproduction

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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Several hormones like hCG, hPL, estrogen, progesterone are produced by
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Placenta of human being is
(I) Yolk sac placenta
(II) Chorioallantoic placenta
(III) Zonary placenta
(IV) Discoidal placenta
(V) Haemochorial placenta
(VI) Indeciduate placenta
(VII) Deciduate placenta
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Which ONE of the following statements is CORRECT about placenta?
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans

Write the differences between blastula and morula.

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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
In human beings, at the end of 12 weeks (first trimester) of pregnancy, the following is observed:
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Describe the formation of the placenta during the pregnancy.
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans

Match the following columns and select the correct option:-

Column-I Column-II
(a) Ovary (i) Human chorionic gonadotropin
(b) Placenta (ii) Estrogen & Progesterone
(c) Corpus luteum (iii) Androgens
(d) Leydig cells (iv) Progesterone only
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Embryo after the first 8 weeks of development is called _____.
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Assertion (A): During the formation of placenta, some layers of uterus are eroded and during parturition, extensive haemorrhage occurs
Reason (R): Placenta of man is described as haemo endothelial placenta
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
The substance that helps in relaxing the muscles and ligaments of pelvic organs during parturition:
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
From an early amphibian embryo the cells that would give rise to skin in adults were transplanted into the developing brain region of another embryo. The transplanted cells developed into brain tissue in the recipient embryo. What do you infer from this experiment?
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
What is called differentiation?
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
List the three hormones produced in women only during pregnancy. What happens to the levels of oestrogen and progesterone during pregnancy?
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Name any one hormone released by placenta during pregnancy.
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Explain the culmination of pregnancy in humans.
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
After which month of the embryo development in humans, the growth of the placenta slows down?
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans

Match the following:

  List I   List II
A Totipotent cell I Haemopoietic stem cells
B Pluripotent cell II Muscle stem cell
C Multipotent cell III 8 cell stage blastocyst
D Unipotent cell IV Inner cell mass
    V Mast cell
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Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Select the correct option describing gonadotropin activity in a normal pregnant female:
MEDIUM
Biology>Reproduction>Human Reproduction>Pregnancy and Placenta Formation in Humans
Morphogenetic movements take place predominantly during the following embryonic stage: