In the male human being, sperms contain autosomes and

1. Only one Y-chromosome

2. Only one X-chromosome

3. Both X and Y-chromosome

4. Either X or Y-chromosome

Subtopic:  Sex Determination in Humans |
From NCERT
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The structure of testis of a mammal can be identified by the presence of

(1) Spermatogonia

(2) Spermatocytes

(3) Cells of Sertoli

(4) Spermatids

Subtopic:  Seminiferous Tubules & Spermatogenesis |
From NCERT
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In the vertebrates testes, for nourishment during spermiogenesis, the spermatids get attached to

(1) Interstitial cells

(2) Sperm-mother cells

(3) Spermatocytes

(4) Sertoli cells

Subtopic:  Seminiferous Tubules & Spermatogenesis |
 87%
From NCERT
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The menstrual cycle begins with the casting off of

(1) Placenta

(2) Blood

(3) Endometrial lining along with blood vessels

(4) All the three

Subtopic:  Introduction to Menstrual Cycle: 1 | Introduction to Menstrual Cycle: 2 | Introduction to Menstrual Cycle |
 76%
From NCERT
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During parturition, the fetal ejection reflex triggers the release of:

1. An increasing amount of estrogen and a decreasing amount of progesterone from the placenta
2. A decreasing amount of estrogen and an increasing amount of progesterone from the placenta
3. Oxytocin from the maternal pituitary
4. GnRH from the fetal hypothalamus
Subtopic:  Fetal Development & Parturition |
 88%
From NCERT
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Menstruation is triggered by an abrupt decline in the amount of:

1. Estrogen

2. Progesterone

3. LH

4. FSH

Subtopic:  Menstrual Cycle: Luteal Phase |
 75%
From NCERT
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What structure gets implanted on the wall of the uterus during embryonic development?

1. 2.
3. 4.

Subtopic:  Implantation : Part 1 | Implantation |
 85%
From NCERT
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Which of the structures shown in the following diagram contributes to the source of nutrition for the sperms ejaculated in the semen?

  

1. A

2. B

3. C

4. D

Subtopic:  Male Reproductive Duct System |
 72%
From NCERT
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Fertilisation in humans is practically feasible only if

1. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube
2. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
3. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
4. the sperms are transported into vagina just after the release of ovum in fallopian tube

Subtopic:  Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
 84%
From NCERT
NEET - 2016
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Which of the following events is not associated with ovulation in human female?

1. Decrease in oestradiol

2. Full development of Graafian follicle

3. Release of secondary oocyte

4. LH surge

 

Subtopic:  Introduction to Menstrual Cycle: 2 | Introduction to Menstrual Cycle |
 78%
From NCERT
NEET - 2015
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