Biology

Pregnancy and Childbirth

996 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 biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Choose the correct answers from the alternatives given.
The main role of placenta in embryonic development is to

  1. act as storage organ

  2. convey nerve impulses

  3. provide essential requirements for growth of embryo

  4. protect embryo from shocks
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The placenta facilitates the supply of oxygen and nutrients to the embryo and also the removal of carbon dioxide and excretory/waste materials produced by the embryo.

So the correct option is 'provide essential requirements for growth of embryo'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Fetal ejection reflex in human female is induced by

  1. Pressure exerted by amniotic fluid

  2. Release of oxytocin from pituitary

  3. Fully developed foetus and placenta

  4. Differentiation of mammary glands
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The signals for parturition originates from the fully developed foetus and placenta, which induce mild uterine contractions called as foetal ejection reflex. This triggers the release of oxytocin, which is birth hormone from the maternal pituitary gland. This oxytocin starts a series of powerful contractions in the uterus to help expel the baby and limits bleeding of the placenta near the entry of the vaginal canal.
Thus, the correct answer is option (C).

Multiple choice biology life processes: control and coordination feedback mechanism mechanism of hormone action and feedback mechanisms role of hormones in coordination

Uterine contraction during child birth is an example of ______

  1. Positive feed back mechanism

  2. Negative feedback mechanism

  3. Both A and B

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

Examples of positive feed back mechanisms are very few. One example is that of uterine contractions during child birth. Normal state of uterus is un contacted, one contraction instead of commanding to come to normal gives a message to continue further (positive feedback till the delivery is completed).

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Perinatal asphyxia is seen in 

  1. Adults

  2. Old people

  3. Newborn infant

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

Perinatal asphyxia is the medical condition resulting from deprivation of oxygen (hypoxia) to a newborn infant long enough to cause apparent harm. It results most commonly from a drop in maternal blood pressure or interference during delivery with blood flow to the infant's brain. 

Therefore, the correct answer is option C.

Multiple choice evs life is precious road safety and pollution personal health care disaster

Erythroblastosis foetalis is a disease in which

  1. adult has severe anaemia and jaundice

  2. foetus do not survive due to erythrocyte blast

  3. foetus is suffering from blood cancer

  4. foetus has severe anaemia and jaundice
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Erythroblastosis fetalis is a condition which arises when a female is rhesus negative and the mail is Rh positive.
It causes the death of the foetus within the womb or just after birth.
The child from such a couple inherits the Rh positive trait from the father. 
The Rh-positive red blood corpuscles of a foetus in the womb enter the blood of the mother where the development of Rh antibodies takes place as the mother's blood is rhesus negative it causes more harm to her. 
These antibodies along with the mother's blood on reaching the fetal circulation cause the clamping of fetal RBC. The first child is born normal because by that time the number of antibodies in mothers that remain lesser but they increase with successive pregnancy
So, the correct option is 'foetus has severe anaemia and jaundice'
Multiple choice biology mendel's law of inheritance determination of sex sex determination sex determination in humans

Mother is responsible for the sex of a baby.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sex of the child is completely dependent on the father and not mother. This is because men are XY and women are XX. This means that the woman can only donate one X chromosome to her child, while the father can either donate an X or a Y. If the father donates the X to the child, it will be XX and become a female, if the father donates a Y to the child, it will be XY and will become a male.

Multiple choice zoology aids to health innate and acquired immunity body fluids and immune responses immunity and immune system

Immunity obtained by the transfer of antibodies from the mother through the placenta by the foetus is 

  1. Artificially acquired active immunity

  2. Naturally acquired passive immunity

  3. Naturally active active immunity

  4. Artificially acquired passive immunity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Passive immunity is the type of immunization when a ready-made antibody is directly given to the patient to protect the body against foreign attack. It can be injected artificially or provided naturally by mother milk (colostrum) or by transferring it to the foetus by the placenta.

So the correct option is "Naturally acquired passive immunity".

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'.