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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
With the help of diagrammatic representation, explain the process of gametogenesis
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.
The process of release of the ovum from a mature follicle is called ______.
Describe the process of budding in hydra.
Implantation of embryo occurs in ______.
Describe the process of oogenesis in human female.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
Sex organs produce gametes which are diploid.
Answer the following type of question Assertion (A) and Reason (R).
(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.
(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.
At what stage of development are the gametes formed in newborn male and female?
Expand the acronym.
hCG
Identify the labels (i-iv) in the given diagram of the ovum.
Identify the proper order of spermatogenesis and choose the correct option.
The human male gamete is usually about ______ in length.
Which of the following contains a fluid filled cavity called antrum?
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
The principal tail piece of human sperm shows the microtubular arrangement of ______.
At what stage of life is oogenesis initiated in a human female?
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?
Fetal sex can be determined by examining cells from amniotic fluid looking for:
Follicular atresia is:
In human females, meiosis II is not completed until:
Germ cells present in the seminiferous tubules undergo ______
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
Given below are two statements.
- Statement I: The spermatids are non-motile and non-functional which get transformed into functional spermatozoa by the process of spermiogenesis.
- Statement II: During the process of this change, the spermatids remain held to each other and to Leydig's cells by cytoplasmic bridges.
In light of the above statements, select the correct answer from the option given below.
Distinguish between human sperm and ovum.
What is spermatogenesis?
The process of gametogenesis is initiated by ______ and ______ hormones respectively.
