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What are the structures within the muscle fiber that shorten to cause skeletal muscle fiber contraction?
The structures within the muscle fiber that shorten to cause skeletal muscle contraction are called myofibrils. Myofibrils are composed of repeating units called sarcomeres, which contain thick and thin filaments made of proteins (actin and myosin). When the muscle fiber is stimulated by a nerve impulse, the myosin heads interact with the actin filaments to generate the force required for muscle contraction.
A skeletal muscle cell is also known as a?
A skeletal muscle is also known as a striated muscle. When viewed under polarized light or stained with an indicator, alternating stripes of light and dark are visible.
The structure storing calcium in the skeletal muscle fibers at rest is the?
The structure responsible for storing calcium in skeletal muscle fibers at rest is the sarcoplasmic reticulum. This organelle regulates the release of calcium ions during muscle contraction to trigger the muscle fiber to contract.
What is the advantage of having many nuclei in a skeletal muscle fiber?
Having many nuclei in a skeletal muscle fiber allows for efficient repair and regeneration of the muscle tissue. It enables the muscle fiber to synthesize proteins and grow in response to exercise or injury. Additionally, the multiple nuclei provide more genetic material for protein production, enhancing the muscle's ability to adapt and increase in size.
Why are skeletal muscle cells multinucleated?
The number of cells depends on how large the muscle is; muscles consist of fiber bundles, which are made up of myofibrils. A sarcomere is one of the segments that the myofibril is divided into. In each fiber bundle there are multinucleate cells, which can extend the length of the skeletal muscle. So, the number of cells in a skeletal muscle depends on the size of the muscle. for example, the number of cells in one of our triceps larger than one of the small muscles in a finger.
What is the multinucleate muscle fiber?
Skeletal
How relaxation in a skeletal muscle fiber occurs?
Relaxation of a skeletal muscle usually involves the Golgi tendon proprioceptors.
Most skeletal muscles contain?
muscle fiber
A specialized cell found in a skeletal muscle is called a muscle fiber?
true
The cytoplasm of a skeletal muscle fiber is called the?
Sarcoplasm
What are the repeating segments seen in skeletal muscle fiber?
sarcomeres
Why do skeletal muscles have multiple nuclei and what is the significance of this unique feature in their function?
Skeletal muscles have multiple nuclei because they are formed by the fusion of many individual muscle cells. This feature allows for efficient repair and growth of muscle tissue, as each nucleus can control a specific area of the muscle fiber. The significance of this unique feature is that it enables skeletal muscles to adapt and respond to physical demands, such as exercise, by increasing protein synthesis and muscle mass.
What is the correct sequencing of the microstructure of skeletal muscle?
muscle fiber, myofibril, myofilaments, sarcomere
How are the Neuron and skeletal muscle fiber connected?
they are connected with the rope in the body
How is a skeletal muscle fiber stimulated by a motor neuron?
motor unitUnit
What is the name of small contractile elements of skeletal muscle fiber?
sarcomere
What type of sensory receptors are made up of very small skeletal muscle fiber?
muscle spindles
