Identify the organ system in humans that is derived from all the three embryonic germ layers:
1. cardiovascular system.
2. digestive system.
3. endocrine system.
4. muscular system.

Subtopic:  Embryonic Development till Gastrulation |

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Parturition involves a positive feedback between:
1. uterine contraction, estrogen
2. estrogen, progesterone
3. estrogen, oxytocin
4. uterine contraction, oxytocin

Subtopic:  Fetal Development & Parturition |
 81%

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Lactation after child birth is possible due to decrease in the secretion of:
1. HCG
2. oxytocin
3. FSH and LH
4. estrogen and progesterone

Subtopic:  Fetal Development & Parturition |

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The initial phase of the cortical reaction leads to:
1. slow block to polyspermy
2. fast block to polyspermy
3. formation of pronuclei
4. completion of acrosome reaction

Subtopic:  Spermiogenesis/Sperm Structure/Hormonal Regulation |
 53%

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Prolactin is secreted by:
1. hypothalamus
2. anterior pituitary
3. posterior pituitary
4. mammary glands

Subtopic:  Fetal Development & Parturition |
 63%

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The first form of milk produced by the mammary glands of mammals immediately following delivery of the newborn is called:

1.prolactin2.progesterone
3.milk4.colostrum

Subtopic:  Fetal Development & Parturition |
 92%
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The most common age for the onset of puberty in females is:
1. 8-9 years
2. 9-10 years
3. 11-13 years
4. 14-15 years

Subtopic:  Female Reproductive System-2 |
 77%

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Identify the incorrect statement:
1. Spermatogenesis begins at puberty.
2. Secondary spermatocyte has 23 chromosomes.
3. Oogenesis lasts only from puberty until menopause
4. oogenesis begins in fetal life

Subtopic:  oogenesis |
 71%
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Identify the incorrect statement:
1. Granulosa cells produce estrogen
2. LH surge is due to peak secretion of progesterone
3. The corpus luteum secretes both progesterone and estrogen along with inhibin
4. FSH acts directly on granulosa cells

Subtopic:  Menstrual Cycle: Luteal Phase |
 67%
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The uterine contractions [labor pains] are initiated due to:
1. An increase in estrogen secretion
2. A decrease in oxytocin secretion
3. An increase in the progesterone: estrogen ratio
4. A decrease in FSH and LH

Subtopic:  Fetal Development & Parturition |
From NCERT

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