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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
How is 'oogenesis' markedly different from 'spermatogenesis' with respect to the growth till puberty in the humans?
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
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 ______.
Name the hormones involved in regulation of spermatogenesis.
______ type of reproduction occurs without fusion of gametes.
The process which the sperm undergoes before penetrating the ovum is ____________.
The Androgen Binding Protein (ABP) is produced by ____________.
Identify the labels (i-iv) in the given diagram of the ovum.
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
First meiotic division is observed in ____________.
Middle piece of mammalian sperm possesses ______.
Sertoli cells are found in ______.
Identify the wrong statement from the following.
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
Cavity of graafian follicle is ______.
Cells of corona radiata remain grouped together by ______.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
The nutritive cells found in seminiferous tubules are ______.
The principal tail piece of human sperm shows the microtubular arrangement of ______.
During oogenesis, each diploid cell produces ______.
What does the figure represent?
Fetal sex can be determined by examining cells from amniotic fluid looking for:
3-celled male gamete develops in:
In human females, meiosis II is not completed until:
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
How many spermatozoa are formed from one secondary spermatocyte?
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.
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.
What is spermatogenesis?
During oogenesis the meiotic division is arrested at ______ before fertilization.
In which structures does spermatogenesis occur?
Which of the following phases are shared by both spermatogenesis and oogenesis?
