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प्रश्न
Name the functions - Acrosome of sperm.
What is the function of acrosome of sperm.
Name the function of the following:
Acrosome
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उत्तर
It is a cap-like structure present in the anterior part of the head of the sperm. It contains the hyaluronidase enzyme, which hydrolyses the outer membrane of the egg, thereby helping the sperm to penetrate the egg at the time of fertilization.
संबंधित प्रश्न
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
Name the hormones involved in regulation of spermatogenesis.
______ type of reproduction occurs without fusion of gametes.
At the time of birth, there are _______________ oocytes in the ovary of a female foetus.
If newborns are produced at the age of menopause, they may be with some abnormalities. Why?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
Sex organs produce gametes which are diploid.
At what stage of development are the gametes formed in newborn male and female?
Describe the structure of the human ovum with a neat labelled diagram.
The secondary oocyte enter into the fallopian tube through the ______.
Identify the diploid cell.
Identify the longest period of menstrual cycle.
Identify the CORRECT sequence of events.
The immature male germ cells differentiates into ______ at the end of meiosis I.
The human male gamete is usually about ______ in length.
In human beings, the largest cell formed during Oogenesis is ______
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
The immature male germ cell undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to the above.
Which of the following groups of cells in the male gonad, represent haploid cells?
Which one is released from the ovary?
Head of epididymis is called as ______.
Which of the following are called dual gland?
Mark the odd one.
Penetration of the sperm in the ovum is followed by ______
Human milk differs from cow's milk because human milk contains:
Capacitation refers to changes in the ______.
How many primary oocytes produce one oogonia?
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
In spermatogenesis, at the end of the first meiotic division ______ are formed.
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.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
The diagram given below shows the various steps in spermatogenesis.
- Name the parts labelled '1', '2' and '3'.
- Name the process by which part '3' changes to part '4'.
Draw a labelled diagram of a section through the ovary.
Select a correct pair of cells with identical set of chromosomes.
Which gamete is produced through oogenesis?
