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प्रश्न
Ovulation is induced by a hormone called ______.
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उत्तर
Ovulation is induced by a hormone called luteinising hormone (LH).
Explanation:
LH (luteinising hormone) acts on the leydig cells and stimulates the synthesis and secretion of androgens. Androgens, in turn, stimulate the process of spermatogenesis.
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संबंधित प्रश्न
How is 'oogenesis' markedly different from 'spermatogenesis' with respect to the growth till puberty in the humans?
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
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.
Male and female gametes are ______.
The fusion of the male and the female gametes is called ______.
Draw a labelled diagram of sperm.
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.
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Mammalian egg is ____________.
Draw a labeled sketch of a spermatozoan.
Describe the structure of the human ovum with a neat labelled diagram.
During spermatogenesis, spermatogonium grows in size to become ______.
Identify the proper order of spermatogenesis and choose the correct option.
Identify the CORRECT sequence of events.
First meiotic division is observed in ____________.
Draw a labelled diagram of a Graafian Follicle.
Spermiation is the process of the release of sperm from ______.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
How many sperms are formed from 4 primary spermatocytes?
Which one is released from the ovary?
In oogenesis haploid egg is fertilised by sperm at which stage?
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:
The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n = 50 shall be:
In spermatogenesis, at the end of the first meiotic division ______ are formed.
Meiotic division of the secondary oocyte completed ______.
Which gamete is produced through oogenesis?
In which organ does oogenesis take place?
