describe in detail the anatomy of skeletal muscles

Solutions

Expert Solution

ANATOMY OF SKELETAL MUSCLES
Skeletal muscle are the striated muscle or voluntary muscles. Which acts according to the voluntary action of individuals.
Skeletal muscle structure:
Composed of muscle cells(fibers) , connective Tissue and blood vessels. These fibers are long and multi nucleated. These nuclei are Peripherally situated. It has a striated appearance . It develops from myoblasts.
Muscle fibers anatomy
1. SARCOLEMMA: is the cell membrane. Surrounds the sarcoplasm( cytoplasm of the fiber)
2. MYOFIBRILS: are bundles of protein filament. It is a cylindrical structure in muscle fiber. It has two types filaments
A) actin ( thin)
B) myosin( thick)
All the myofibrils are arranged parallel to the long axis of cells

Features of skeletal muscle:
Presence of striations due to the presence of alternative dark and light bands
A dark band ( A band) contains thin and thick filaments, and it is anisometropic to polarized light.
H zone
A light band only contains light thin filaments. , and it is isotropic to polarized light. Each band is bisected by z line.
SARCOMERE
The portion of myofibrils between two successive z lines.

PARTS OF SKELETAL MUSCLE
1.FLESHY PART
2. FIBROUS PART
a. Tendinous
b. Aponeurotic
CLASSIFICATION ( according to color)
Red muscle
White muscle
2. ACCORDING TO DIRECTION of muscle fibers
Quadri lateral
Strap
Strap with tendinous intersection
Fusiform
Digastric
Cruciate
Spiral.
MUSCLE ACTION
1 PRIME MOVER
2.ANTAGONIST
3.fixator
4.synergist.

Sydney Mullin answered 9 months ago

Next > < Previous

Related Solutions

Describe the anatomy of spine, bones, nerves and muscles.

describe in detail the anatomy of capillaries

Describe the main differences in the way that skeletal and smooth muscles contract

Briefly describe both the macro and micro (cellular) anatomy of a skeletal muscle.

Describe the skeletal anatomy of Homo habilis and Homo erectus. What are their similarities and differences...

Describe the skeletal anatomy of Homo habilis and Homo erectus. What are their similarities and differences and which one shows more amounts of variation?

Describe the molecular mechanism of skeletal muscle contraction in detail.

Describe in detail as great a detail as possible the mechanism by which skeletal muscle cells...

Describe in detail as great a detail as possible the mechanism by which skeletal muscle cells contract. Start with an action potential arriving at an axon terminal of a motor neuron and end with the completion of a single cross- bridge cycle. Be sure you describe all the events and how the operate, and name all the structures, ions, proteins, molecules involved and explain the role each has. Use proper terminology and explain what is happening at each step. Then...

You should be able to: Describe the three types of muscles (cardiac, skeletal, smooth), including their...

You should be able to: Describe the three types of muscles (cardiac, skeletal, smooth), including their functions and where they are found Explain the important functions of muscles Explain why skeletal muscles have a striated appearance Understand the how the sliding filament model of muscle contraction works Understand the role of the troponin and tropomyosin in muscle contraction Describe the structure of the thick (myosin) and thin (actin) filaments Explain how a signal travels from a motor neuron to a...

Topic 6: Skeletal muscle contraction Describe in detail the entire process of excitation coupling in skeletal...

Topic 6: Skeletal muscle contraction Describe in detail the entire process of excitation coupling in skeletal muscle, begin with an action potential reaching the synaptic knob of a motor neuron through completion of a cross Bridge cycle. after detailing those events to include the following information Define a motor unit describe motor unit recruitment and Explain how these terms relate to excitation-contraction coupling. Define and describe muscle twitch and summation and explain how these terms relate to motor unit/motor unit...

Describe in detail the anatomy and how the brain functions in of the awareness of sensory...

Describe in detail the anatomy and how the brain functions in of the awareness of sensory input, the control of skeletal muscles, and memory.

Subjects