Importance of Oxytocin

Q.

What is parturition? Which hormones are involved in induction of parturition?

Q.

What is parturition? Which hormones are involved in induction of parturition?

Q. Foetal ejection reflex in human female is induced by

1. Placenta only.
2. Fully developed foetus and placenta.
3. Release of oxytocin from the pituitary gland.
4. Release of full developed corpus luteum.

Q.

Which one of the following hormones, though synthesized elsewhere, is stored and released by the master gland?

1. Melanocyte stimulating hormone

2. Prolactin

3. Luteinizing hormone

4. Antidiuretic hormone

Q. The signals for parturition originates from the fully developed foetus and followed by placenta causing the mild contractions called:

1. Foetal ejection reflex
2. Embryo ejection reflex
3. Blastocoel ejaculation reflex
4. Still birth

Q. Which hormone is known as ‘birth hormone’?

1. Estrogen
2. Oxytocin
3. Progesterone
4. Prolactin

Q.

why does papaya abort pregnancy?

Q.

Which one of the following hormones stimulates the release of breast milk from the mothers, when the baby is suckling?

1. Progesterone

2. Oxytocin

3. Prolactin

4. Relaxin

Q. All the following are uses of amniocentesis, but one is misuse. Which one is misuse?

1. The centres for genetic counselling offer amniocentesis on request to women for chromosome analysis
2. This technique has been developed for detecting foetal abnormalities by analyzing chromosomal defects
3. It is used to study metabolic defects of foetus like PKU (phenylketonuria)
4. It is done to examine the sex of the foetus

Q. Which of the following statements is correct about oxytocin in pregnant females?

1. Stimulates contraction during implantation
2. Secreted by ovary
3. Stimulates growth of mammary glands
4. Stimulates uterine contraction during parturition

Q. Milk secretion is caused by :-

1. Progesterone
2. PRH
3. PRL
4. Oxytocin

Q. What is parturition? Which hormones are involved in induction of parturition?

Q. Hormone which stimulates the ‘let down’ release of milk from mother’s breast when the baby is feeding, is:

1. Prolactin
2. Progesterone
3. Oxytocin
4. Relaxin

Q. Intensely lactating mothers do not generally conceive due to the _________.

1. suppression of gonadotropins
2. hypersecretion of gonadotropins
3. suppression of transport of gametes
4. excess secretion of testosterone

Q. In amniocentesis the fluid is taken from

1. 
   foetal blood
2. 
   mother's blood
3. 
   body fluid of mother
4. 
   fluid surrounding foetus

Q. Which hormone is/are responsible to stimulate release of milk from mother breast and secretion of mammary gland after child birth ?

1. Progesteron/prolactin
2. Oxytocin/PRL
3. PRL/oxytocin
4. Oxylocinirelayin

Q.

What Is The Basis Of Lactational Amenorrhea?

Q. The choanocytes line

1. The canals.
2. The ostia
3. The spongocoel
4. Both (A) and (B)

Q. Assertion :Parturition is induced by neural signal in maternal pituitary. Reason: At the end of gestation period, the maternal pituitary release prolactin which causes uterine contractions.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. hCG, hPL and relaxin are produced in women

1. At puberty
2. During pregnancy
3. Before puberty
4. At menopause
5. During menstruation

Q. Which hormone stimulates the secretion of milk in female?

1. LH
2. Prolactin
3. Oxytocin
4. Progesterone

Q. The signals for parturition originates from the fully developed foetus and followed by placenta causing the mild contractions called:

1. Foetal ejection reflex
2. Embryo ejection reflex
3. Blastocoel ejaculation reflex
4. Still birth

Q. 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

Q.

ADH increases of the walls of collecting duct.

Q. Foetal ejection reflex in human female is induced by?

1. Release of oxytocin from pituitary
2. Fully developed foetus and placenta
3. Differentiation of mammary gland
4. Pressure exerted by amniotic fluid

Q.

What is the meaning of lactation all amenorrhoea.

Q.

Which one of the following hormones stimulates the release of breast milk from the mothers, when the baby is suckling?

1. Progesterone

2. Oxytocin

3. Prolactin

4. Relaxin

Q. The diagram given alongside is that of a developing human foetus in the womb. Study the same and answer the following question.
What is the role of umbilical cord in the development of foetus?

Q.

Corpus leuteum can live long ut it degenerateasy within 10 to 12 days why?

Q. Case:
The average duration of human pregnancy is about 9 months. Parturition in humans is induced by a complex neuroendocrine mechanism. Rekha has completed her 9 months of pregnancy and her expected delivery date has passed but she has not undergone labor. Both her and family got worried and went to the hospital to consult her obstetrician. A complete blood work was done and the doctor observed extremely low levels of certain hormones and high levels of hPL, estrogen, thyroxine, etc.
On further examination, the doctor revealed that her uterus is not showing vigorous contractions which are extremely needed for delivery of the foetus. The doctor took consent from Rekha and injected her with a medicine to promote uterine contractions. Also, her obstetrician counselled her about benefits of breast feeding and good practices for postnatal care of herself and the baby.

Which of the following event is not important for initiation of parturition in a human female?
[0.7 mark]

1. Release of oxytocin from maternal pituitary
2. Increased level of cortisol
3. Signals from fully developed foetus and placenta
4. Release of prolactin