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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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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