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Human Reproduction

Question
CBSEENBI12046921
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Which of the following is true regarding sperm?

  • Fertilizin : for penetrating egg membrane

  • Hyalurodinase : for penetrating egg membrane

  • Acrosin : dissolves corona radiata

  • Capacitation : takes place in penis

Solution

B.

Hyalurodinase : for penetrating egg membrane

Hyaluronidase is a hydrolytic enzyme present in the acrosome of sperm (human testes). It lyses the glycosaminoglycans in the extracellular matrix holding the cell of the corona radiata together. As the coronal cells become more loosely associated, sperm cells can propel themselves inward, toward the zona pellucida by making a receptive cone or fertilization cone through the cytoplasm of the egg. Hyaluronidase may also be involved in breaking down the Zona Pellucida.

Fertilizin is a chemical substance secreted from the cortical region of egg cytoplasm to attract the sperm towards the egg.

Acrosin is released from the acrosome of a spermatozoa as a consequence of the acrosome reaction. It aids in the penetration of Zona Pellucida.

Capacitation is the final stage in the maturation process of spermatozoa. This takes place inside the genital tract as the sperm penetrates the ovum.

Some More Questions From Human Reproduction Chapter

Primary spermatocyte produces 4 spermatozoa, but primary oocyte produces :

Ovulation takes place :

Which of the following shows hermaphroditism and self fertilization ?

The chromosone in primary spermatocyte are :

The male reproductive system is located in the body, in the :

Sertoli cells provide :

The middle piece of human sperm contains :

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

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