Advertisements
Advertisements
प्रश्न
Which of the following hormones is not secreted by human placenta?
विकल्प
LH
Progesterone
Estrogens
hCG
Advertisements
उत्तर
LH
Explanation:
The placenta secretes hCG, estrogens, and progesterone, but LH is secreted by the anterior pituitary gland, not the placenta.
APPEARS IN
संबंधित प्रश्न
Comment on the role of placenta as an endocrine gland.
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?
Medically it is advised to all young mothers that breast-feeding is the best for their newborn babies. Do you agree? Give reasons in support of your answer.
Mention any two functions of the human placenta.
Eye lens is formed from ______.
Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
In the development of the human body, the ectoderm is responsible for the formation of ______.
Mark the odd one.
Which of the following statements are correct with respect to hormones secreted by the placenta?
- The placenta secretes relaxin during the later stage of pregnancy.
- The placenta secretes a high amount of FSH during pregnancy.
- The placenta secretes relaxin during the initial stage of pregnancy.
- The placenta secretes hCG and hPL during pregnancy.
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
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?
Extra-embryonic membranes provide:
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.
Name the type of antibody that can be transferred through the placenta.
During embryogenesis in dicots, the zygote divides into a basal cell and a terminal cell. The basal cell divides repeatedly to produce a structure called suspensor. Carefully observe the image given below and describe the function of cell – A and cell – B of the suspensor.
Zygote
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:
