Biology

Pregnancy and Childbirth

964 Questions

This hub covers essential biology questions on pregnancy, fetal development, and childbirth. Topics include the placenta, maternal physiology, and the stages of labor. These concepts are frequently tested in general science sections of various competitive examinations.

Placenta and fetal nutritionStages of laborMaternal immune systemPregnancy complications

Pregnancy and Childbirth Questions

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Why is umbilical cord preserved after the birth?

  1. It is a source of RBC.

  2. It has a greater content of blood plasma.

  3. It is a source of stem cells.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Stem cells are found in all organisms and are capable of dividing to form new cells which can be differentiated into various types of specialised cells. The umbilical cord is the structure which attaches the fetus with the placenta in the maternal womb. The umbilical cord contains the embryonic stem cells which can use for the treatment of disorders during the life of an individual. The umbilical cord can be preserved during the child birth.

Thus, the correct answer is option C.  

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Amniotic fluid acts as a source of ............ cells at the time of childbirth.

  1. Stem.

  2. RBC.

  3. WBC.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The amniotic fluid is present in the amniotic cavity in which the embryo develops. The amniotic fluid contains the stem cells. These cells can be checked by karyotyping for the presence of any chromosomal disorder. These stem cells are present till the childbirth because after birth, the structures are expelled out. 

Thus, the correct answer is option A. 

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Cord blood is the sample of blood taken from the

  1. Placenta.

  2. Umbilical cord.

  3. Urethra.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stem cells are found in all organisms and are capable of dividing to form new cells which can be differentiated into various types of specialised cells. The umbilical cord is the structure which attaches the fetus with the placenta in the maternal womb. The cord blood is the sample of blood which is collected from the umbilical cord. The umbilical cord contains the embryonic stem cells which can use for the treatment of disorders during the life of an individual and so, they are preserved. 

Thus, the correct answer is option B.  

Multiple choice botany modes of reproduction sexual reproduction in organisms sexual reproduction & its importance reproduction in organisms

Hysterical pregnancy is also known as

  1. False pregnancy

  2. Pseudopregnancy

  3. Phantom pregnancy

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Hysterical pregnancy is the appearance of signs and symptoms associated with pregnancy when the person is not actually pregnant.
  • It is also known as false pregnancy, phantom pregnancy, pseudopregnancy or pseudocyesis, 
  • False pregnancy may sometimes be purely psychological.
  • So, the correct option is 'All of the above'.
Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Structure connecting the fetus to placenta is ________________.

  1. Umbilical cord

  2. Amnion

  3. Yolk sac

  4. Chorion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Umbilical cord is a narrow, tube-like structure that connects the fetus to the placenta.Through this tube, nutrients and oxygen are supplied from the mother to the baby and waste products are removed from the baby.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Fetus gets nourishment and oxygen through _______________.

  1. Allantois

  2. Placenta

  3. Yolk sac

  4. Chorion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Placenta is an intimate connection between the fetus and uterine wall of the mother to exchange the materials. Food materials and oxygen pass from the mother's blood into the fetal blood and fetal excretory products diffuse into maternal blood through placenta.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Mother's blood flows into the foetus through placenta

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The placenta is a temporary association between the foetal and maternal tissues. It acts as a barrier between the foetus and mother and is contributed by both foetal and maternal tissue. Exchange of gases takes place through the placenta. The foetus obtains nutrients and oxygen from the mother's blood as the mother's blood can flow into the foetus through the placenta.
Hence, the statement given in the question is correct.
So, the correct answer is 'True'.
Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Human placenta is

  1. Haemochorial

  2. Syndesmochorial

  3. Yolk sac

  4. Haemo-endothelial
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Placenta, an organ characteristic of true mammals during pregnancy, joining mother and offspring, providing endocrine secretion and selective exchange of soluble blood borne substances through apposition of uterine and trophoblastic vascularized parts. In humans, haemochorial placenta is found in which all maternal layers are lost, so that foetal tissue is in contact with maternal blood. It is also seen in rodents, and most primates
So, the correct answer is 'Haemochorial'
Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

The _____ is connecting structure which helps in the transfer of substance to and from the foetal body.

  1. Placenta

  2. Ovary

  3. Uterus

  4. vagina
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination and gas exchange.
Ovary produces egg or ovum. Uterus is where implantation takes places and embryo develops. Vagina is the fibromuscular organ that facilitates sexual intercourse and childbirth.
Therefore, the correct answer is option A.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

The placenta functions as

  1. A protective barrier between mother and embryo

  2. Supply oxygen and nutrients for growth of embryo

  3. Expel the waste matter excreted by the embryo

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The placenta is the region which is the main connection between mother and child. It connects the umbilical cord of the developing foetus to the mother's uterine wall to perform several functions. It acts as a barrier between the mother and embryo. It helps in the nutrient uptake, waste elimination, thermoregulation and gas exchange in the foetus through the mother's blood supply. 

Thus, the correct answer is option D. 

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Placenta is the region, where

  1. Foetus is supplied by maternal blood

  2. Embryo is attached to mother by notocord

  3. Foetus receives maternal blood and nutrition

  4. Embryo is enclosed by membranes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The placenta is an organ that develops in the uterus during pregnancy. This structure provides oxygen and nutrients to the growing baby and removes waste products from the baby's blood. The placenta attaches to the wall of the uterus, and the baby's umbilical cord arises from it. In most pregnancies, the placenta attaches to the top or side of the uterus. 

Therefore, the correct answer is option C.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Foetus is nourished by

  1. Placenta

  2. Yolk

  3. Sertoli cells

  4. Phagocytosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A placenta is formed from interdigitation of the trophoblast layer of the embryo and the endometrial lining during implantation. It facilitates the supply of oxygen and nutrients to the developing foetus and is also responsible for removal of carbon dioxide and excretory waste products of the foetus.

Yolk sac along with the allantois layer forms the umbilical cord, the connection between the embryo and the placenta.
Phagocytosis is the ingestion of bacteria and other foreign agents by the defence system of the body.  So the correct answer is A.

Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

In simplest type of placenta, six barriers separate maternal blood from foetal blood. How many barriers are lost in human placenta?

  1. One

  2. Two

  3. Three

  4. Four
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
In human placenta, the barriers include uterine epithelium, uterine connective tissue and endothelium of maternal blood vessels are absent.
So the correct option is 'Three.'
Multiple choice zoology reproduction in humans placenta pregnancy and birth fertilization and post fertilization in humans

Which one is not a character of haemochorial placenta?

  1. $CO _2$ and excretory products pass from foetus to mother's body.
  2. $O _2$ and nutrients from mother's body enter the foetus.

  3. Chorion villi are covered by blood sinuses of mother.

  4. It protects foetus from mechanical shocks.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The haemochorial placenta is the type of placenta in which maternal blood is in direct contact with the chorionic villi which are covered by maternal blood and exchange of gases and nutrients from mother's blood and foetus takes place as observed in humans.

So the correct option is 'It protects foetus from mechanical shocks'