Question
Download Solution PDFWhich part of the sperm help in its entry into the cytoplasm of the ovum?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- Sperms are the mammalian male reproductive cells that participate in fertilization and fuse with the ovum to produce a zygote.
- Each mature sperm consists of 3 parts:
- Head -
- Mammalian sperm head is oval in shape and surrounded with an outer covering called the acrosome.
- The acrosome is composed of degradative enzymes like hyaluronidase and acrosin.
- These enzymes dissolve the outer layers of the ovum and facilitate in the entry of sperm into the cytoplasm of ovum.
- The head region also contains the nucleus.
- The nucleus carries the genetic material that undergoes fusion with the maternal DNA to form the DNA of the new individual.
- Midpiece -
- The middle region of the sperm comprises of compact helical mass of mitochondria.
- The mitochondria provide energy for the movement of the tail.
- This in turn facilitates sperm motility which is essential for fertilization.
- Tail -
- The sperm tail facilitates the movement of the sperm cell by moving in a whip-like manner.
Hence, the correct answer is option 4.
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