Capacitation refers to change in the
1. Sperm before fertilisation
2. Ovum before fertilisation
3. Ovum after fertilisation
4. Sperm after fertilisation

Subtopic:  Semen and Male Fertility |
 80%

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Which of these is not an important component of initiation of parturition in humans?
1. Increase in oestrogen and progesterone ratio
2. Synthesis of prostaglandins
3. Release of oxytocin
4. Release of prolactin

Subtopic:  Fetal Development & Parturition |
 54%
NEET - 2021

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Changes in GnRH pulse frequency in females is controlled by circulating levels of
1. Estrogen and progesterone
2. Estrogen and inhibin
3. Progesterone only
4. Progesterone and inhibin

Subtopic:  Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase |
 79%
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The amnion of mammalian embryo is derived from
1. Mesoderm and trophoblast
2. Endoderm and mesoderm
3. Ectoderm and mesoderm
4. Ectoderm and endoderm

Subtopic:  Embryonic Development till Gastrulation |

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Hormones secreted by the placenta to maintain pregnancy are
1. hCG,hPL, progestogens, estrogens
2. hCG, hPL, estrogen, relaxin, oxytocin
3. hCG, hPL, progestogens, prolactin
4. hCG, progestogens, estrogens, glucocorticoids

Subtopic:  Fetal Development & Parturition |
 82%
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The difference between spermiogenesis and spermiation is:

1. In spermiogenesis, spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation, spermatozoa are formed.
2. In spermiogenesis, spermatozoa are formed, while in spermiation, spermatids are formed.
3. In spermiogenesis, spermatids are formed, while in spermiation, spermatozoa are formed.
4. In spermiogenesis, spermatozoa are formed, while in spermiation, spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
Subtopic:  Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
 80%
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Match the items given in Column I with those in Column II and select the correct option given below:

Column I Column II
(a) Proliferative Phase (i) Breakdown of the endometrial lining
(b) Secretory Phase (ii) Follicular Phase
(c) Menstruation (iii) Luteal Phase
Codes:
(a) (b) (c)
1. (ii) (iii) (i)
2. (i) (iii) (ii)
3. (iii) (ii) (i)
4. (iii) (i) (ii)
Subtopic:  Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase |
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For normal fertility, what percent of the sperm in ejaculate must exhibit vigorous motility?

1.202.30
3.404.60

Subtopic:  Semen and Male Fertility |
 82%
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Transfer of sperms into the female genital tract is called:

1.  Insemination 2.  Emission
3.  Ejaculation 4.  Spermiation

Subtopic:  Semen and Male Fertility |
 90%
From NCERT
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Each seminiferous tubule is lined by male germ cells called:

1.Spermatogonia2.Primary spermatocytes
3.Sertoli cells4.Leydig cells

Subtopic:  Male Reproductive Duct System | Semen and Male Fertility |
 75%
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