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 is radioactivity , What is Radioactivity ? Radioactivity :  Som...

What is Radioactivity ? Radioactivity :  Some isotopes, called radioisotopes, have unstable nuclei that release high energy particles or radiant energy, or both. An example

Bacteria, Bacteria The study of bacteria is called bacteriology. Bacte...

Bacteria The study of bacteria is called bacteriology. Bacteria are unicellular organisms and possess a distinct cell wall. They are included in kingdom Prokaryote. The bacter

Why are the tropical forests also known as stratified forest, Why are the t...

Why are the tropical forests also known as stratified forests? In tropical forests tall trees of various species have their crowns forming a superior layer under which diverse

Define stomata, What are the stomata? How these structures participate in t...

What are the stomata? How these structures participate in the plant transpiration? The Stomata (singular, stoma) are small specialized passages for gases and water present in t

Determine the ideal clinical conditions of teeth, The ideal clinical condit...

The ideal clinical conditions of teeth which we know already include: - the absence of pain. - less than 0.1 mm initial hori-ontal mobility under lateral forces of less than

Stages of aerobic respiration, Stages of Aerobic Respiration: Glycoly...

Stages of Aerobic Respiration: Glycolysis (cytoplasm) Process 2ATP used for Glucose -> Fructose 1,6 bisphosphate Fructose splits into G3P and DHAP. DHAP

Nerve cell - the basic unit, Nerve Cell - The Basic Unit The basic un...

Nerve Cell - The Basic Unit The basic unit of the nervous system is the nerve cell or neuron. A neuron is to the nervous system what a brick is to the building. It has a cell

What do you mean by alzheimer''s disease, Q. What is Alzheimer's disease? ...

Q. What is Alzheimer's disease? The Alzheimer's disease is a degenerative disease of the central nervous system in which the patient has progressive dementia and alteration of

Amount of proteins present in the cell, Cells regulate their level of activ...

Cells regulate their level of activity by regulating the amount of proteins present in the cell at any given time, so an up regulation of enzymes would be expected to A. increase t

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