Striped muscles, Biology

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.
Posted Date: 10/1/2012 3:47:44 AM | Location : United States







Related Discussions:- Striped muscles, Assignment Help, Ask Question on Striped muscles, Get Answer, Expert's Help, Striped muscles Discussions

Write discussion on Striped muscles
Your posts are moderated
Related Questions
Explain Vasopressindrug term? As a single bolus of 40 U, vasopressin has been recommended as an alternative to epinephrine in VF/pulseless VT refractory to defibrillation. Furt

Q. How can the binding of two amino acids for the peptide formation be explained? A peptide is formed when a carbon from the carboxyl group of one amino acid is connected to th

Intermittent Treatment Intermittent 4-drug regimens with 2 or 3 doses per week after at least 2 weeks of daily therapy are also effective for treatment of TB and should alway

The ability to maintain myocardial perfusion at constant levels in the face of changing driving presence is termed autoregulation. In normal cases, autoregulation is maintained at

what are the biological significance of skeleton

Economic Significance - Conservation of Wildlife Certain wild species are important because of their actual or potential economic value to people. Wildlife resources provide p

Various acute complications of diabetes mellitus are described in this unit. Acute complications develop within a short period of time. These are due to improper treatment of diabe


A snapdragon plant that bred true for white petals was crossed to a plant that bred for purple petals, and all the F1 had white petals. The F1 was selfed. Among the F2, three other

Mammalian Lungs - Respiration In this we will study mainly mammalian lungs as it is the best representative of a respiratory surface adapted for terrestrial respiration. For t