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 Multiple Choice QuestionsMultiple Choice Questions

81.

The embryo at 16 celled stage is known as

  • morula

  • gastrula

  • blastula

  • blastomere


82.

Ovulation takes place in a month between

  • 11-14 day

  • 14-16 day

  • 15-28 days

  • 21-26 day


83.

Accessory sexual character in female is promoted by

  • androgen

  • progesterone

  • estrogen

  • testosterone


84.

Sertoli cells are found in testis. These cells are

  • nurse cells

  • reproductive cells

  • receptor cells

  • None of the above


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85.

Acrosome is formed by

  • nucleus

  • Golgi apparatus

  • mitochondria

  • none of these


86.

Grey crescent is the area

  • at the point of entry of sperm into ovum

  • just opposite to the site of entry of sperm into ovum

  • at the animal poles

  • at the vegetal pole


87.

If mammalian ovum fails to get fertilized which one of the following is unlikely?

  • Corpus luteum will disintegrate

  • Estrogen secretion further decreases

  • Primary follicle starts developing

  • Progesterone secretion rapidly declines


88.

The immediate cause of induction of ovulation in female is the large plasma surge of

  • progesterone

  • estradiol

  • LH

  • FSH


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89.

Progesterone is secreted by

  • Corpus luteum

  • Utreus

  • Placenta

  • Graafian follicle


A.

Corpus luteum

Progesterone is a steroid hormone and main female sex hormone. It is secreted during the later half of the menstrual cycle in human females by temporary endocrine tissue, the corpus luteum. The luteinizing hormone (LH) of anterior pituitary brings about a rupture of the Graafian folllicle to release the ovum and changes the ruptured follicle into a yellow structure called corpus luteum, which secrets progesterone.


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90.

Refer to the given figure and choose the correct option regarding its parts labelled as A-F

  • B-Graafian follicle, F-Corpus luteum

  • C-Graafian follicle, A-Ovum

  • B-Primary follicle, C-Tertiary follicle showing antrum

  • E-Corpus callosum, D-Antrum cavity


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