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81. |
Which of these is an extra embryonic membrane: |
A. |
Amnion and chorion |
B. |
Allantois |
C. |
Yolk sac |
D. |
All of these |
Answer: Option C
Explanation:
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82. |
Mammalian gastrula is different from frog's gastrula in one of the following respects: |
A. |
It is only-single layered |
B. |
During its formation involution and invagination processes occur |
C. |
Blastopore and archenterons are not formed |
D. |
The archenterons is filled with fluid |
Answer: Option C
Explanation:
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83. |
Foetal membranes are found in: |
A. |
Cyclostomes, fishes and amphibians |
B. |
Reptiles, birds and mammals |
C. |
Both of the groups in (a) & (b) |
D. |
None of these |
Answer: Option B
Explanation:
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84. |
The extra embryonic membranes in rabbit are: |
A. |
Amnion and chorion |
B. |
Allantois |
C. |
Yolk sac |
D. |
All of these |
Answer: Option D
Explanation:
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85. |
As a result of metabolism in the body of mammalian embryo: |
A. |
No wastes are formed |
B. |
Waste products are reabsorbed by embryo |
C. |
Waste products accumulated eliminated at birth |
D. |
Waste products are eliminated through mother's body |
Answer: Option D
Explanation:
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86. |
An intimate connection between the body of mother and embryo is called: |
A. |
Placenta |
B. |
Primitives streak |
C. |
Hensen's knot |
D. |
None of these |
Answer: Option A
Explanation:
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87. |
Mammalian placenta has: |
A. |
A foetal part contributed by the embryo through allantois and chorion |
B. |
A maternal part contributed by the mother through uterine wall |
C. |
Both (a) & (b) |
D. |
None of these |
Answer: Option C
Explanation:
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88. |
Foetal part of mammalian placenta has: |
A. |
Outermost layer of trophoblast only |
B. |
Allantochorion only |
C. |
Endothelia of capillaries of allantoic artery and vein |
D. |
All of these structures |
Answer: Option D
Explanation:
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89. |
Maternal part of the placenta in man consists of: |
A. |
Uterine mucosa only |
B. |
Uterine submucosa only |
C. |
Endothelia of capillaries of uterine blood vessels |
D. |
All of these |
Answer: Option D
Explanation:
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90. |
Placenta in man is: |
A. |
Epitheliochorial type |
B. |
Haemochorial type |
C. |
Haemoendothelial types |
D. |
None of these |
Answer: Option D
Explanation:
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