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Human Reproduction · Question 58

AIPMT 2015 (Cancelled)MCQEasy📈 Topic in 25% papers+4−1
1

Which of these is not an important component of initiation of parturition in humans?

  1. Release of oxytocin
  2. Release of prolactin
  3. Increase in estrogen and progesterone ratio
  4. Synthesis of prostaglandins

Answer

(2) Release of prolactin

Solution

As per NCERT, parturition is induced by a complex neuroendocrine mechanism: signals from the fully developed foetus and the placenta induce mild uterine contractions (foetal ejection reflex), which trigger release of oxytocin from the maternal pituitary.

At the end of pregnancy the estrogen : progesterone ratio rises and prostaglandins are synthesised; both increase uterine contractions.

Prolactin is concerned with milk production (lactation), not with initiation of parturition.

∴ Release of prolactin is not a component of initiation of parturition.

Answer: (2)

AIPMT 2015 (Cancelled)

Keep practising — Human Reproduction

2

The shared terminal duct of the reproductive and urinary system in the human male is

  1. urethra
  2. ureter
  3. vas deferens
  4. vasa efferentia
AIPMT 2014
3

The main function of mammalian corpus luteum is to produce

  1. estrogen only
  2. progesterone
  3. human chorionic gonadotropin
  4. relaxin only
AIPMT 2014
4

Select the correct option describing gonadotropin activity in a normal pregnant female.

  1. High level of FSH and LH stimulates the thickening of endometrium.
  2. High level of FSH and LH facilitates implantation of the embryo.
  3. High level of hCG stimulates the synthesis of estrogen and progesterone.
  4. High level of hCG stimulates the thickening of endometrium.
AIPMT 2014
5

What is the correct sequence of sperm formation?

  1. Spermatogonia, spermatozoa, spermatocytes, spermatids
  2. Spermatogonia, spermatocytes, spermatids, spermatozoa
  3. Spermatids, spermatocytes, spermatogonia, spermatozoa
  4. Spermatogonia, spermatocytes, spermatozoa, spermatids
NEET 2013
6

Which of the following is not the function of placenta?

  1. Facilitates supply of oxygen and nutrients to embryo
  2. Secretes estrogen
  3. Facilitates removal of carbon dioxide and waste material from embryo
  4. Secretes oxytocin during parturition
NEET 2013
7

Menstrual flow occurs due to lack of :

  1. Progesterone
  2. FSH
  3. Oxytocin
  4. Vasopressin
NEET 2013
8

The foetal ejection reflex in humans triggers the release of

  1. oxytocin from foetal pituitary
  2. human chorionic gonadotropin (hCG) from placenta
  3. oxytocin from maternal pituitary
  4. human placental lactogen (hPL) from placenta
NEET 2013 (Karnataka)
9

The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/ characteristic. [Figure]

  1. A- Tertiary follicle - Forms Graafian follicle
  2. B- Corpus luteum - Secretes progesterone
  3. A- Primary oocyte - It is in the prophase I of the meiotic division
  4. B- Corpus luteum - Secretes estrogen
NEET 2013 (Karnataka)
10

The secretory phase in the human menstrual cycle is also called :

  1. Follicular phase lasting for about 6 days
  2. Luteal phase and lasts for about 13 days
  3. Follicular phase and lasts for about 13 days
  4. Luteal phase and lasts for about 6 days
AIPMT 2012 (Mains)
11

Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two, together. [Figure]

  1. Developmental stage Late morula, Site of occurrence Middle part of Fallopian tube
  2. Developmental stage Blastula, Site of occurrence End part of Fallopian tube
  3. Developmental stage 8-celled morula, Site of occurrence Starting point of Fallopian tube
  4. Developmental stage Blastocyst, Site of occurrence Uterine wall
AIPMT 2012 (Mains)

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