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Myofibrils
The sarcolemma is the cell membrane of a muscle fiber. It surrounds and protects the muscle fiber and controls the movement of substances into and out of the cell. The sarcolemma plays a crucial role in muscle contraction and the transmission of nerve impulses to the muscle fiber.
No. Calcium does have a major role in muscle fibers when your muscles contract, but it is not the actual fiber.
tension is higher
1
A single muscle cell is called a muscle fiber.
3
Myofibril
make more muscle fiber
a muscle fiber
muscle fiber
The smaller fiber in a muscle fiber is called a myofibril. A band of tissue that connects bone to bone is called a ligament.
The sacromere with the proteins actin and myosin allow the muscle cell (fiber) to contract.
Myofibrils
This question is confusing. Are you asking if you see only a relaxed muscle fiber in EMs? Yes, you would only see that, not a contracted muscle fiber. The preparation could only be of a relaxed fiber.
A whole muscle is the whole muscle while a muscle fiber is part of a muscle. I'm not sure if I'm correct though, so check with some different sources.
muscle cell