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

Explain the probiotics in foods, Explain the Probiotics in Foods? Yoghu...

Explain the Probiotics in Foods? Yoghurts have been supplemented with probiotic strains of bifidobacteria and Lactobacilli. Milks fermented solely by intestinal isolates of lac

Developmental biology, a recent topic for my developmental biology assignm...

a recent topic for my developmental biology assignment

Berry - development of seed, Berry - Development of Seed In a berry mu...

Berry - Development of Seed In a berry much of the pericarp is fleshy or juicy. In tomato Lycopersicon esculentum even the placenta on which the seeds are borne is fleshy. The

Hypolimnion - summer stratification, Hypolimnion - Summer Stratification ...

Hypolimnion - Summer Stratification This zone forms the bottom layer which is deep, cold and non- circulating. The hypolimnion is generally rich in nutrients though its oxygen

Define about the lactose, Define about the Lactose? Lactose has a molec...

Define about the Lactose? Lactose has a molecular structure consisting of galactose and glucose. It is of interest because it is associated with lactose intolerance which is th

Geotropism - root and shoot morphogenesis, Geotropism - Root and Shoot Morp...

Geotropism - Root and Shoot Morphogenesis Roots always grow towards gravity. The lot threshold of geotropic response requires as little time as one minute Gravity pulls auxin

Captive breeding - measures for species conservation, Captive Breeding - Me...

Captive Breeding - Measures for Species Conservation Species which are reduced to dangerous levels need more intensive management, and one strategy is their captive breeding.

Explain food applications of dextran, Food Applications Dextran can be ...

Food Applications Dextran can be used in food products, as it is capable of moisture retention and inhibition of crystallization of sugar. The properties of dextran as gelling

How would a glycosidic bond present, A glycosidic bond would be present in:...

A glycosidic bond would be present in: Select one: a. acetone. b. methyl-alpha-D-glucose. c. 2-deoxy-beta-D-ribose. d. glucose-6-phosphate. e. fructose-1, 6-bisphosp

Define development - terminologies used in chromatography, Define Developme...

Define Development - Terminologies used in Chromatography? Development is the process of passing a mobile phase over the adsorbent or support. During the development the sample

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