Tail - structure of the sperm, Biology

Assignment Help:

Tail - Structure of the Sperm

The tail or flagellum is the longest part of the sperm. By its movement it causes the sperm to swim with the head forward. It consists of a thin layer of cytoplasm surrounded by plasmalemma. The axial filament is the main part of the tail or flagellum. Its structure is essentially similar to a typical flagellum or cilium with the arrangement of 9 peripheral pairs and one central pair of longitudinal fibers. The major portion of the flagellum is called 'axoneme'. An axoneme is formed by the microtubules emerging out of the centriole at the base of sperm nucleus. The core of the axoneme consists of two central microtubules surrounded by a row of nine doublet microtubules. In fact, only one microtubule is complete having thirteen protofilaments; the other is C-shaped having only eleven protofilaments.  The protofilaments are exclusively made of the dimeric protein-tubulin. Another protein dynein is attached to microtubule. The dynein is capable of hydrolysing ATP molecule and can convert chemical energy into mechanical energy that propels the sperm.


Related Discussions:- Tail - structure of the sperm

Describe explicit and semantic memory, Q. Describe Explicit and Semantic Me...

Q. Describe Explicit and Semantic Memory? Explicit memory: This is the conscious recollection of information such as specific facts or events and at least in humans that can be

Define the translocation of food through sieve tubes, Arrange the following...

Arrange the following processes sequentially to define the translocation of food through sieve tubes.   i. Unloading of sugar in sink cells (or cells of root).  ii. Uptak

How yersinia enterolytica infection occurs, Normal 0 false fa...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4 How Yersinia enterol

Which functional group ionization is stabilized by resonance, In which of t...

In which of the following functional groups ionization is stabilized by resonance? Select one: a. Carboxyl b. Hydroxyl c. Amine d. Aldehyde e. All of the above

What is a bio regenerative system, What is a bio regenerative system? Why i...

What is a bio regenerative system? Why is it essential? Nutritional requirements for long flights have been refined, placing more demands on food development. Despite the techn

Where in living beings can found mineral salts, Q. Which are mineral salts?...

Q. Which are mineral salts? Where in living beings can found mineral salts? Ans. Mineral salts are simple inorganic substances made of metallic chemical elements, like sodiu

Surgical treatment of mitral stenosis, Q. Surgical Treatment of mitral sten...

Q. Surgical Treatment of mitral stenosis? Available surgical treatment modalities include closed mitral valvotomy, open mitral valvotomy, and mitral valve replacement. With th

Photoreceptor - phototropism, Photoreceptor - Phototropism The molecul...

Photoreceptor - Phototropism The molecular nature of the photoreceptor is unsolved. Initially in the 1930s, some form of carotenoid was thought to be the phototropic receptor.

Define the effects of dietary fibre, Define the Effects of Dietary Fibre? ...

Define the Effects of Dietary Fibre? After reviewing the properties of fibre, we will now study various physiological effects of fibre, as it passes through the gut. The effect

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd