- 1(current)
Q. No.| Assertion (A): | During pregnancy, the level of several hormones like estrogens, progestogens, cortisol, prolactin, thyroxine, etc are increased several folds in the maternal blood. |
| Reason (R): | Increased production of these hormones is essential for supporting the foetal growth, metabolic changes in the mother, and maintenance of pregnancy. |
| 1. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Embryonic Development till Gastrulation |
 71%
Level 2: 60%+
Hints
How many statements given below are correct?
1. 2
2. 1
3. 4
4. 3
| (i) | Relaxin is secreted by the ovary in the later phase of pregnancy. |
| (ii) | Inner cell mass differentiates into ectoderm and endoderm just before implantation. |
| (iii) | Implantation leads to pregnancy. |
| (iv) | Embryo with 8 to 16 blastomeres is called morula. |
2. 1
3. 4
4. 3
Subtopic: Â Embryonic Development till Gastrulation |Â Fertilization |Â Implantation |
 67%
Level 2: 60%+
Hints
Read the following statements carefully and choose the option which has only correct statements
(a) The trophoblast layer of blastocyst gets attached with myometrium during implantation
(b) Inner cell mass gets differentiated as the embryo
(c) After attachment, the uterine cells divide rapidly and covers the blastocyst
(d)The blastocyst continues to divide and transforms into morula
(e) Chorionic villi which are surrounded by the uterine tissue, are formed before implantation
1. (a) , (b), (c)
2. (b), (c), (d)
3. (b), (c)
4. (b), (d)
(a) The trophoblast layer of blastocyst gets attached with myometrium during implantation
(b) Inner cell mass gets differentiated as the embryo
(c) After attachment, the uterine cells divide rapidly and covers the blastocyst
(d)The blastocyst continues to divide and transforms into morula
(e) Chorionic villi which are surrounded by the uterine tissue, are formed before implantation
1. (a) , (b), (c)
2. (b), (c), (d)
3. (b), (c)
4. (b), (d)
Subtopic: Â Embryonic Development till Gastrulation |Â Implantation |
 61%
Level 2: 60%+
Hints
Match Column-I with Column-II and select the correct option using the codes given below:
| Column-I | Column-II | ||
| A. | Mons pubis | 1. | Embryo formation |
| B. | Antrum | 2. | Sperm |
| C. | Trophectoderm | 3. | Female external genitalia |
| D. | Nebenker | 4. | Graafian follicle |
1. A-2 B-4 C-3 D-1
2. A-3 B-4 C-1 D-2
3. A-3 B-1 C-4 D-2
4. A-1 B-4 C-3 D-2
Subtopic: Â Embryonic Development till Gastrulation |Â Female External Genitalia |
 89%
Level 1: 80%+
NEET - 2016
Hints
Match the following columns and select the correct option.
| Column-I | Column-II | ||
| a. | Placenta | (i) | Androgens |
| b. | Zona pellucida | (ii) | Human chronic Gonadotropin |
| c. | Bulbo-urethral glands | (iii) | Layer of the ovum |
| d. | Leydig cells | (iv) | Lubrication of the Penis |
| a | b | c | d | |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (ii) | (iii) | (iv) | (i) |
| 4. | (ii) | (iv) | (i) | (ii) |
Subtopic: Â Male Reproductive System |Â Ovary |Â Embryonic Development till Gastrulation |
 88%
Level 1: 80%+
NEET - 2020
Hints
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| Assertion(A): | Holoblastic cleavage with almost equal sized blastomeres is a characteristics of placental animals. |
| Reason(R): | Eggs of most mammals including humans are of centrolecithal type. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Embryonic Development till Gastrulation |Â Fertilization |
Level 3: 35%-60%
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| Assertion (A): | Blood flowing in umbilical cord of human embryo is 100% foetal. |
| Reason (R): | Umbilical cord helps in transport of substances between foetal and maternal blood. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Embryonic Development till Gastrulation |Â Fetal Development & Parturition |
 59%
Level 3: 35%-60%
Hints
| Assertion(A): | The inner cell mass of blastocyst differentiates into outer and inner layer just before implantation. |
| Reason(R): | The outer layer of blastocyst forms the embryo. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Implantation : Part 1 |Â Implantation : Part 2 |Â Embryonic Development till Gastrulation |Â Fetal Development & Parturition |Â Implantation |
 63%
Level 2: 60%+
Hints
- 1(current)
Q. No.
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