NEET BIOLOGY

Detailed explanation-1: -The midpiece contains the mitochondria which supplies the energy the tail needs to move. The tail moves with whip-like movements back and forth to propel the sperm towards the egg. The sperm have to reach the uterus and the fallopian tube in order to fertilize a woman’s egg.

Detailed explanation-2: -Sperm cells use their tails to swim, though some don’t use the whole tail – leaving a piece at the end inactive. This part only constitutes about 3 to 5 per cent of a normal sperm tail – which is usually between 50 and 55 micrometres long – and doesn’t actively …

Detailed explanation-3: -Once inside the female reproductive tract, sperm use their tail-like appendages to swim for the egg. A chemical signal around the egg called progesterone boosts the sperm’s movements into a “hypermotile” state. Tail movements become stronger and able to generate more swimming force.

Detailed explanation-4: -The flagellum, also called the sperm “tail”, is a slender lash-like appendage that protrudes from the cell body. By beating their tails, sperm cells swim to the female reproductive cell (oocyte) and fertilise it. A bundle of microtubules that span the entire length of the tail is critical for flagellar beating.