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 rna polymerase subunits, Each of the three eukaryotic RNA polymera...

Each of the three eukaryotic RNA polymerases has more subunits or 12 and so these are big complex enzymes. The genes encoding some of the subunits of each  eukaryotic  enzyme  show

Explain about the picric acid test, Explain about the Picric acid test? ...

Explain about the Picric acid test? This test is answered by all reducing sugars, with a free aldehyde or ketone groups. Monosaccharides possess a free aldehyde or ketone group

Viscosity - blood flow, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Animal biodiversity, why obwlia is considered to be of special interest in ...

why obwlia is considered to be of special interest in zoologyas an animal showing an intermediate grade of organisation

Explain about urinary system, Explain about Urinary system Urinary sys...

Explain about Urinary system Urinary system provides us with the service of disposing the waste products carried by blood. This function is also known as excretion.

Explain phenotypical characteristics of alleles of a gene, What are few exa...

What are few examples of phenotypical characteristics that present two or more varieties and of phenotypical features that do not vary? In relation to the genes correspondent to th

Evaluation of heart failure, The initial evaluation of new onset heart fail...

The initial evaluation of new onset heart failure should include an electrocardiogram, chest radiograph, and B-type natriuretic peptide assay. The cardiac rhythm may be normal sinu

Rassenkreis and speciation, According to the current concept of speciation,...

According to the current concept of speciation, a widely distributed species should break up into partially isolated rule species. The different subspecies become differentiated fu

DNA, DNA TRANSLATION AND TRANSCRIPTION

DNA TRANSLATION AND TRANSCRIPTION

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