Identify the incorrectly matched pair [with respect to a 28 days cycle]:

1. beginning of menstrual flow - day 1

2. ovulation - day 14

3. LH surge - day 21

4. beginning of proliferative phase - day 5

Subtopic:  Menstrual Cycle: Luteal Phase |
 76%
From NCERT
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What maintains the corpus luteum after fertilization?

1. release of HCG by the trophoblast to maintain the corpus luteum.
2. production of LH by the maternal pituitary.
3. maintenance of the corpus luteum by prolactin.
4. production of estrogen by the adenohypophysis.
Subtopic:  Menstrual Cycle: Luteal Phase |
 67%
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Identify the correct chronological order in which the following structures are formed:

a. blastocyst b. morula c. zygote
 
1. a,b,c 2. a,c,b
3. b,c,a 4. c,b,a
Subtopic:  Embryonic Development till Gastrulation |
 81%
From NCERT
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Which part of the blastocyst develops into the embryo proper?

1. inner cell mass.

2. trophoblast.

3. blastocele.

4. yolk sac.

Subtopic:  Embryonic Development till Gastrulation |
 79%
From NCERT
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Milk secretion by mammary glands is under the control of:

1. oxytocin 2. prolactin
3. estrogen 4. progesterone
Subtopic:  Fetal Development & Parturition |
 53%
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Consider the following statements:

I: The uterine endometrium undergoes cyclical changes during the menstrual cycle.
II: Estrogen secreted during the pre-ovulatory phase of the menstrual cycle helps in the development of follicle.
III: hCG secreted by trophoblast cells helps in maintaining corpus luteum.

Which of the above statements are true?

1. I and II only          2. I and III only
3. II and III only        4. I, II, and III
Subtopic:  Introduction to Menstrual Cycle: 1 | Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase | Embryonic Development till Gastrulation |
From NCERT
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Consider the following statements:

I: The primary follicles present at birth carry primary oocytes arrested at meiosis I.
II: The secondary oocyte arrested at meiosis II is released at ovulation.
III: The second meiotic division is completed by the secondary oocyte just prior to the entry of the sperm into it.

Which of the above statements are true?

1. I and II only          2. I and III only
3. II and III only        4. I, II, and III
Subtopic:  oogenesis |
From NCERT
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The epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother are:

1.chorionic villi cells2.cytotrophoblast cells
3.inner cell mass4.syncytiotrophoblast cells

Subtopic:  Implantation |
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The fluid-filled cavities near the embryonic ectoderm and the embryonic endoderm are respectively:
1. amniotic cavity, blastocele
2. amniotic cavity, yolk sac
3. blastocele, amniotic cavity
4. yolk sac, amniotic cavity

Subtopic:  Embryonic Development till Gastrulation |
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The epidermis and the dermis of the skin develops respectively from embryonic:
1. ectoderm, endoderm
2. ectoderm, mesoderm
3. endoderm, mesoderm
4. endoderm, ectoderm

Subtopic:  Embryonic Development till Gastrulation | Fetal Development & Parturition |
 55%
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