Morula is a solid ball of cells during early embryonic development and consists of:

(1) 4 – 8 cells

(2) 8 – 16 cells

(3) 24 – 30 cells

(4) 60 – 72 cells

 

Subtopic:  Embryonic Development till Gastrulation |
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Cleavage is:

(1) Dissolution of the zona pellucida

(2) A specialized mitotic division in late fetus

(3) A specialized meiotic division in late fetus

(4) A specialized mitotic division in zygote and early embryo

 

Subtopic:  Embryonic Development till Gastrulation |
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Which of the following groups of hormones produced in women only during pregnancy ?

1. hCG, hPL, relaxin

2. Estrogen, progesterone, hCG

3. Cortisol, prolactin, thyroxine

4. Prolactin. progesterone, hCG

Subtopic:  Embryonic Development till Gastrulation |
 88%
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Stem cells that are capable of giving rise to all the tissues and organs are present in:

1. Cumulus oophorus of the Graafian follicle

2. Lutein cells of the corpus luteum

3. Trophoblast cells of the developing embryo

4. Inner cell mass of developing embryo

Subtopic:  Embryonic Development till Gastrulation |
 83%
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In a human female, the blastocyst:
 

1. gets implanted into uterus three days after ovulation
2. gets nutrition from uterine endometrial secretion only after implantation
3. gets implanted in endometrium by the trophoblast cells
4. forms placenta even before implantation
Subtopic:  Embryonic Development till Gastrulation |
 81%
From NCERT
AIPMT - 2010
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Identify the human development 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:

Developmental stage Site of occurrence
1. Blastula End part of fallopian tube
2. Blastocyst Uterine wall
3. 8-celled morula Starting point of fallopian tube
4. Late morula      Middle part of fallopian tube
Subtopic:  Embryonic Development till Gastrulation |
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From NCERT
AIPMT - 2012
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The amount of which hormone increases in Pregnancy?

(1) Cortisol

(2) Insulin

(3) Glucagon

(4) Aldosterone

Subtopic:  Embryonic Development till Gastrulation |
 83%
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The stem cells which have potency to give rise to all tissues and organs are formed from

1. Trophoblast

2. Umbilical cord

3. Inner cell mass

4. Placenta

Subtopic:  Embryonic Development till Gastrulation |
 84%
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Which of the following event does not occur after
implantation?
(a) Appearance of germinal layers
(b) Formation of chorionic villi
(c) Secretion of HCG
(d) Formation of trophoblast and inner cell mass

1. a, d 

2. c,d,

3. d only 

4. c and d

Subtopic:  Embryonic Development till Gastrulation |
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Chorionic Villi will appear after implantation over

(1) Trophoblast

(2) Uterine tissue

(3) Maternal blood cells

(4) Placenta

Subtopic:  Embryonic Development till Gastrulation |
 65%
From NCERT
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