Tag: biology
Questions Related to biology
Each ejaculate of a man contains about how many sperm?
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200
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2000
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200,000
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200,000,000
Which one is primary sex organ?
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Penis
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Scrotum
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Testis
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Prostrate
- The reproductive organs in each gender include a primary sex organ and several secondary sex organs.
- The primary sex organ is the one that produces the gametes of that sex i.e. the sperm or the ova.
- So, in the male, the primary sex organ is testis. In the female, the primary sex organ is the ovary.
The male gamete sperm is produced in
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Ovary
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Penis
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Testis
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Uterus
- The testis is the male gonad in animals. The primary function of the testes is to produce sperm (spermatogenesis) and to produce androgens, primarily testosterone.
Spermatozoa are nourished during their development by
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Sertoli cell
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Interstitial cell
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Connective tissue cell
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Mast cell
- Each lobule of testes contains one to three seminiferous tubules in which the sperms are produced.
- Each seminiferous tubule is lined on its inside by two types of cells called male germ cells (spermatogonia) and Sertoli cells. Sertoli cells are also known as nurse cells.
- They provide nutrition to spermatozoa. Spermatozoa are developing sperms. It is formed during the last stage of spermatogenesis. This stage is known as spermiogenesis.
- In this step, spermatids are transformed into spermatozoa (sperms) by the process of metamorphosis. Heads of spermatozoa are embedded in the Sertoli cells.
Which one is primary sex organ?
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Penis
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Scrotum
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Testis
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Prostrate
The primary sex organ in the male is testis. Besides producing sperms they also produce hormones. Penis and prostate are examples of secondary sex organs. The scrotum is not a sex organ.
Testes are masses of coiled
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Uriniferous tubules
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Malpighian tubules
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Vasa efferentia
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Seminiferous tubules
The tubular structures present inside the testis are known as seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.
Human male germ cell is
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Zygote
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Ovum
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Testis
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Sperm
Human male germ cell is sperm. Each sperm is a single cell. During the last step of spermatogenesis, spermatids are transformed into spermatozoa by the process of metamorphosis. These spermatozoa are known as sperms. Mature sperm consists of a head, a neck, a middle piece and a tail. A plasma membrane envelops the whole body of sperm. The sperm head contains a very little cytoplasm, an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome. Sperm fertilizes with ovum and leads to the formation of zygote.
Testes produces a hormone known as ______
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Testosterone
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Estrogen
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Both A and B
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None of these
What is the function of testes?
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Produces male gametes called sperms
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Produces female gametes called ova
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Both a and b
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None of above
Testes are placed inside the
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Abdominal cavity
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Urinary bladder
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Scrotum
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None of these