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Human Reproduction

Multiple 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

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

89.
Progesterone is secreted by

Corpus luteum

Utreus

Placenta

Graafian follicle

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.