Multiple Choice QuestionsWhich 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
During a woman's life time, she produces about:
40-50 eggs
300-350 eggs
400-500 eggs
750-850 eggs
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
A.
menstruation
The phase of menstrual cycle in humans which lasts for 7-8 days is menstruation. It is the destruction of the mucous membrane of the uterus and consequent bleeding, which occurs periodically in humans.
Luteal phase is a stage of menstrual cycle which occurs after ovulation and before beginning of menses.
Ovulatory phase or ovulation is the midpoint of the menstrual cycle. It starts about 14 days after the follicular phase started.
the follicular phase starts on the first day of menstruation and ends with ovulation. During this phase, FSH or Follicle Stimulating Hormone and LH or Luteinizing Hormone are released from the brain and travel in the blood to the ovaries.
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
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