During a woman's life time, she produces about:
40-50 eggs
300-350 eggs
400-500 eggs
750-850 eggs
C.
400-500 eggs
The number of immature primordial follicles varies with age. In new borns, the number varies from 250,000 to 500,000; at puberty 100,000 to 200,000 and at menopause it is nil. Of these, only 400-500 follicles undergo maturation and ovulation and rest degenerate.
Which one of the following statements with regard to embryonic development in humans is correct?
Cleavage divisions bring about considerable increase in the mass of protoplasm
In the second cleavage division, one of the two blastomeres usually divides a little sooner than the second
With more cleavage divisions, the resultant blastomeres become larger and large
Cleavage division results in a hollow ball of cells called morula
The production and maturation of sperm in testes is known as :
oogenesis
sporogenesis
gametogenesis
spermatogenesis
The phase of menstrual cycle in humans that lasts for 7-8 days, is :
menstruation
luteal phase
ovulatory phase
follicular phase
Which one of the following statement with regard to the embryonic development in humans is correct ?
Cleavage results in a hollow balls of cells called morula
Cleavage in mammalian ova is unequal holoblastic and horizontal
Rearrangement of blastomeres, a central cavity is formed inside the morula
Cleavage bring about considerable increase in the mass of protoplasm
