Sertoli cells are found in from Biology Human Reproduction Class 12 Nagaland Board
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Sertoli cells are found in

  • Ovaries and secrete progesterone

  • adrenal cortex and secrete adrenalin

  • seminiferous tubules and provide nutrition to germ cells

  • pancreas and secrete cholecystokinin


C.

seminiferous tubules and provide nutrition to germ cells

The epithelium of seminiferous tubule is made up of two types of cells -Sertoli cells and spermatogenic cells and spermatogenic cells. Sertoli cells are elongated and pyramidal which partially envelop the spermatogenic cells. These nourish spermatozoa, act as nurse cells for differentiating spermatozoa. These secrete a glycoprotein hormone, called inhibin which is involved in the negative feedback control of sperm production.

The epithelium of seminiferous tubule is made up of two types of cells -Sertoli cells and spermatogenic cells and spermatogenic cells. Sertoli cells are elongated and pyramidal which partially envelop the spermatogenic cells. These nourish spermatozoa, act as nurse cells for differentiating spermatozoa. These secrete a glycoprotein hormone, called inhibin which is involved in the negative feedback control of sperm production.

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Ovulation takes place :
  • 2 weeks before the start of next menstrual cycle
  • 14th day of 28 days cycle
  • 10 days after the cease of previous monthly cycle
  •  All the above are correct.

B.

14th day of 28 days cycle
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The chromosone in primary spermatocyte are :
  •  22 + X 
  • 22+Y
  • 44 + XX
  • 44 + XY

D.

44 + XY
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The process of differentiation of spermatid into a spermatozoa is known as :
  • spermatogenesis
  • gametogenesis
  • spermiogenesis
  • oogenesis

C.

spermiogenesis
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Primary spermatocyte produces 4 spermatozoa, but primary oocyte produces :
  • 1 ovum
  • 2 ova
  • 3 ova
  • 4 ova

A.

1 ovum
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Which of the following shows hermaphroditism and self fertilization ?
  • Earthworm
  • Tapeworm
  • Both A & B
  • Rotifers.

B.

Tapeworm
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