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प्रश्न
Give scientific reason.
There is a menopause when women are 45-50 years old.
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उत्तर
- The natural cessation of menstruation that occurs between the age of 45-50 years is known as menopause.
- Menopause occurs as the secretion of hormones controlling the functions of the female reproductive system either stops or becomes irregular.
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संबंधित प्रश्न
The following is the illustration of the sequence of ovarian events (a − i) in a human female
(i) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
(ii) Name the ovarian hormone and the pituitary hormone that have caused the above mentioned event.
(iii) Explain the changes that occur in the uterus simultaneously in anticipation.
(iv) Write the difference between ‘c’ and ‘h’.
(v) Draw a labeled sketch of the structure of a human ovum prior to fertilization.
Ovulation is induced by a hormone called ______.
Define spermiation.
Describe the structure of the human ovum with a neat labelled diagram.
The secondary oocyte enter into the fallopian tube through the ______.
Formation of ____________ is an indication of the termination of oogenesis.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Sertoli cells are found in ______.
By which process sperms released from the seminiferous tubules?
It The cell division in secondary oocyte is suspended at ______.
During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called ______.
The head of the epididymis at the head of the testis is called ______.
Layers of an ovum from outside to inside is ______.
Aquatic animals in which fertilisation occurs in water are said to be
Observe the given figure and answer the questions that follow.
- Label A and B.
- Identify the process.
- What happens during this process and what is formed?
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
3-celled male gamete develops in:
Capacitation refers to changes in the ______.
What is spermatogenesis?
What is spermatogenesis?
