Striped muscles, Biology

Assignment Help:

STRIPED MUSCLES -

  1. These muscles are found in the limbs, body walls, tongue, pharynx and beginning of oesophagus and are under the control of animal's will.
  2. These muscle fibres are normally attached to the skeleton.
  3. Each muscle fibre is an elongated cell surrounded externally by a delicate membrane, the sarcolemma.
  4. Its fibres are multinucleated or syncytial in nature.
  5. The cytoplasm of each fibre (sarcoplasm) has a large number of myofibrils which are tightly packed.
  6. Each myofibril shows dark and light bands of stripes alternating with. each other.
  7. The sarcoplasm contains a protein pigment myoglobin.

 

FUNCTIONS-

  1. These muscles are under the control of animal's will.
  2. Calcium is an essential element for the contraction of muscles.
  3. In the presence of calcium ions and energy from ATP, actin and myosin interact forming actomyosin which causes contraction of muscles.
  4. During muscle contraction conversion of pyruvic acid to lactic acid proceeds anaerobically.
  5. Lactic acid is transported by blood to liver where it is converted to glycogen.
  6. Chemical energy is changed into mechanical energy during muscle contraction.
  7. The contraction of muscles of shortest duration is seen in eye lids. Shivering in cold is a method for production of heat by muscle contraction.

Related Discussions:- Striped muscles

What are imago and nymph, Q. What are imago and nymph? Nymphs are larva...

Q. What are imago and nymph? Nymphs are larvae of hemimetabolic insects (like grasshoppers). They are very similar to the adult insect although smaller, In holometabolic insect

What are the other substances resorbed by nephron tubules, Where does most ...

Where does most of the water resorbed after glomerular filtration go? What are the other substances resorbed by the nephron tubules? Only 0.5 to 1% of the glomerular filtrate i

Guidelines for diabetic patients for healthy coping, Q. Guidelines for Diab...

Q. Guidelines for Diabetic Patients for Healthy Coping? Generally, a diabetic patient adapts to day to day stress effectively, as they accept their disease condition with the s

Explain in detail about the concomitant squint, Explain in detail about the...

Explain in detail about the Concomitant squint Concomitant squint is also called comitant squint. It means "I follow you", i.e., in all directions of gazes, the squinted eye fo

Illustrate the effect of the drugs, Which of the following is an effect of ...

Which of the following is an effect of the following drugs? A. Drug A is an agonist of the Vasopressin2 Receptor (V2R).  High levels of Drug A in the extracellular spaces surro

Control of the cell cycle, The cell cycle is controlled by a cyclically ope...

The cell cycle is controlled by a cyclically operating set of reaction sequences that both trigger and coordinate key events in the cell cycle • The cell-cycle control system is

Do disinfectants kill bacteria, Do disinfectants kill bacteria? Secure ...

Do disinfectants kill bacteria? Secure various types of commercial and house- hold disinfectants. Inoculate as more culture dishes as you have samples of disinfectant and singl

Endothelium derived constricting factor, Endothelium is a source of vasocon...

Endothelium is a source of vasoconstrictor factor also. The best characterized of these are the endothelins. Endothelium produces only ET1. Unlike NO, which is released rapidly in

Agro industrial-processing of roughage, Processing of roughage Roughag...

Processing of roughage Roughages constitute the bulk of the ration of farm animals and these include green fodder (leguminous and non-leguminous), grasses, and various crop re

Define filming projection and technique, Q. Filming Projection and Techniqu...

Q. Filming Projection and Technique? Biplane ventriculography is preferred over single plane ventriculography because it gives more information without additional risk to the p

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