How many secondary spermatocytes are required to form 400 million spermatozoa?
1. 50 million
2. 100 million
3. 200 million
4. 400 million
Subtopic: Seminiferous Tubules & Spermatogenesis |
63%
From NCERT
NEET - 2022
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below:
| Assertion (A): | Pregnancy is characterised by metabolic changes in the mother. |
| Reason (R): | During pregnancy, the level of thyroxine is increased in the 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. | (A) is False but (R) is True. |
Subtopic: Fetal Development & Parturition |
60%
From NCERT
NEET - 2022
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Read the following statements A and B and choose the correct option.
| Statement (A) : | Soon after the placenta is delivered, the infant is also expelled out of the uterus. |
| Statement (B) : | Doctors inject oxytocin to induce delivery of the baby when it is not secreted in adequate amount from maternal pituitary. |
| 1. | Both statements (A) and (B) are correct |
| 2. | Both statements (A) and (B) are incorrect |
| 3. | Only statement (A) is correct |
| 4. | Only statement (B) is correct |
Subtopic: Fetal Development & Parturition |
64%
From NCERT
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Read the following statements carefully.
How many of the above statements are true with respect to the human reproductive system?
1. 1
2. 3
3. 2
4. 4
| a. | Humans are sexually reproducing and viviparous. |
| b. | The ovaries in human females produce only hormones. |
| c. | The mammary glands are one of the female secondary sexual characters. |
| d. | A normal human sperm is composed of a head, neck, and middle piece only. |
1. 1
2. 3
3. 2
4. 4
Subtopic: Introduction | Spermiogenesis/Sperm Structure/Hormonal Regulation | Mammary Gland & Lactation | Female Reproductive System-1 | Female Reproductive System-2 |
65%
From NCERT
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Read the following statements (a) to (d) with respect to normal adult human and choose the option with only correct statements.
1. (a) and (b)
2. (b) and (c)
3. (a) and (c)
4. (c) and (d)
| a. | Interstitial spaces of testis contain Leydig cells and other immunologically competent cells. |
| b. | Testes are situated inside the abdominal cavity within a pouch called scrotum. |
| c. | The scrotum helps in maintaining the low temperature necessary for spermatogenesis. |
| d. | Each lobule of testis contains 250 seminiferous tubules in which sperms are produced. |
2. (b) and (c)
3. (a) and (c)
4. (c) and (d)
Subtopic: Male Reproductive System | Basic Anatomy of Testis |
70%
From NCERT
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Spermiation is a process in which sperms are
1. Detached from Sertoli cells and are finally released from the seminiferous tubules
2. Produced within seminiferous tubules
3. Embedded in cells of Sertoli for their nourishment
4. Transported from testis to epididymis
1. Detached from Sertoli cells and are finally released from the seminiferous tubules
2. Produced within seminiferous tubules
3. Embedded in cells of Sertoli for their nourishment
4. Transported from testis to epididymis
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
84%
From NCERT
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Match column-I with column-II and choose the correct option:
a b c d
1. (i) (ii) (iii) (iv)
2. (ii) (iv) (i) (iii)
3. (ii) (iv) (iii) (i)
4. (ii) (iii) (iv) (i)
| Column-I | Column-II | ||
| a. | Milk | (i) | Spermatids are transformed into spermatozoa |
| b. | Primary spermatocyte | (ii) | Stored in the cavity of alveoli |
| c. | Spermiogenesis | (iii) | First menstruation begins at puberty |
| d. | Menarche | (iv) | Periodically undergo meiosis |
1. (i) (ii) (iii) (iv)
2. (ii) (iv) (i) (iii)
3. (ii) (iv) (iii) (i)
4. (ii) (iii) (iv) (i)
Subtopic: Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation | Mammary Gland & Lactation |
94%
From NCERT
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Arrange the following reproductive events in humans according to their occurrence.
(a) Gestation
(b) Gametogenesis
(c) Insemination
(d) Fertilisation
(e) Parturition
(f) Implantation
Select the option with the correct sequence.
1. a → c → d → f → b → e
2. b → c → d → f → a → e
3. b → c → d → a → f → e
4. c → b → d → e → a → f
(a) Gestation
(b) Gametogenesis
(c) Insemination
(d) Fertilisation
(e) Parturition
(f) Implantation
Select the option with the correct sequence.
1. a → c → d → f → b → e
2. b → c → d → f → a → e
3. b → c → d → a → f → e
4. c → b → d → e → a → f
Subtopic: Introduction |
84%
From NCERT
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The ratio of maternal to foetal blood flowing through umbilical cord of a mammalian embryo is
1. 50 : 50
2. 75 : 25
3. 0 : 100
4. 100 : 0
1. 50 : 50
2. 75 : 25
3. 0 : 100
4. 100 : 0
Subtopic: Fetal Development & Parturition |
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Which of the following is true with respect to the most variable phase of menstrual cycle with respect to hormone?
1. Equal level of LH and FSH
2. Level of estrogen and progesterone is almost same
3. Level of LH is lower than FSH
4. Level of estrogen is higher than progesterone
1. Equal level of LH and FSH
2. Level of estrogen and progesterone is almost same
3. Level of LH is lower than FSH
4. Level of estrogen is higher than progesterone
Subtopic: Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase | Introduction to Menstrual Cycle |
58%
From NCERT
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