Advertisements
Advertisements
प्रश्न
Give scientific reason.
There is a menopause when women are 45-50 years old.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
The glandular accessory organ which produces the largest proportion of semen is ____________.
Describe the structure of the human ovum with a neat labelled diagram.
Identify the labels (i-iv) in the given diagram of the ovum.
Which of the following occurs during maturation phase of spermatogenesis?
Which is the correct order of steps occurring during spermatogenesis?
First meiotic division is observed in ____________.
Acrosome reaction in sperm is triggered by ______.
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
Cells of corona radiata remain grouped together by ______.
Gray crescent is the area ______.
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called ______.
In oogenesis haploid egg is fertilised by sperm at which stage?
Select the correct sequence of stages of spermatogenesis in a human male ______.
The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:
Which of the following cells during gametogenesis is normally diploid?
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring. What are the processes through which these events take place?
Draw a neat and labelled diagram of spermatogenesis.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
Distinguish between human sperm and ovum.
