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Spermatogenesis starts at the age of ul(...

Spermatogenesis starts at the age of `ul((A))` due to significant increase in the secretion of `ul((B))`.

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(A) Puberty (B) GnRH
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Spermatogenesis starts at the age of puberty due to significant increase in the secretion of

Given below are four statement (A-D) each with one of two blanks .Select the option which correctly fill up the blanks in two statements A The human male ejaculates about (i) million sperms during a cooitus . Out of which for normal fertility at teast (iii) percent sperms must have normal shape and size B. A primary spermatocyte completes (i) meiotic division leading to the formation of two equal haploid cells called (i) C. Spermatogenesis starts at the age of (i) due to significant increase in the secretion of (ii) a hypothalamic hormone D. Oogenesisi is initiated during embryonic development and at puberty only (i) primary follicles are left in each overy

ul((A)) acts at the leyding cells and stimulates synthesis and secretion of ul((B)) .

LH acts as the ul((A)) cells and stimulates synthesis of ul((B)) .

After completion of second meiotic division of the secondary oocyte and result in the formation of a ul((A)) and a haploid ul((B)) .

FSH acts on the ul((A)) cells and stimulates secretion of ul((B)) which help in the process of ul((C)) .

The ul((A)) division starts as the zygote moves through the isthmus of the oviduct called ul((B)) .

In ul(A) of the dicotyledonous plants, the ul(B) elongation of the radicle leads of the formation of ul(C) . Choose the correct option

During follicular phase changes in the ovary and the uterus are induced by chages in the levels of ul((A)) and ul((B)) hormones.

During summer when body loses more water due to profuse sweating and dehydration what will happen? (a) Osmolarity of body fluids decreases (b) Decrease in secretion of Atrial natriuretic peptide (c) Decrease in secretion of ADH from pituitary (d) Increase in glomerular filtration rate

ALLEN-HUMAN REPRODUCTION -Question
  1. How many structures are haploid ? Spermatogonia , spermatozoa, sperm...

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  2. How many structures are diploid ? Sperms, spermatid, spermatogonia, ...

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  3. Spermatogenesis starts at the age of ul((A)) due to significant increa...

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  4. ul((A)) acts at the leyding cells and stimulates synthesis and secreti...

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  5. The sperm head contains an elongated diploid nucleus. (True/false)

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  6. Which part of sperm produce energy for the movement of tail ?

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  7. The human male ejaculates about ul((A)) million sperms during a coitus...

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  8. What are the major functions of male accessory ducts and glands?

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  9. The process of formation of a mature female gamete is called ?

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  10. At what stage of life is oogenesis initiated in a human female?

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  11. How many primary fillicles are left in each ovary at puberty ?

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  12. Correct sequence of follicular development: (a) Graafian follicle (M...

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  13. The graafian follicle ruptures to release the ul((A)) from the ovary b...

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  14. The reproductive cycle in the female primates is known as .........

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  15. The first menstruation beings at ul((A)) and is called ul((B)).

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  16. In human females, menstruation is replaced at an average interval of ...

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  17. How many ovule is released during the middle of each menstrual cycle?

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  18. Menstrual phase is completed about ?

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  19. The menstrual flow results due to breakdown of...........

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  20. The menstrual phase is followed by the which phase ?

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