Sarcolemma (Noun)
Meaning
An extensible membrane enclosing the contractile substance of a muscle fiber.
Classification
Nouns denoting body parts.
Examples
- The sarcolemma of skeletal muscle cells serves as the primary barrier for ionic exchanges during muscle contraction and relaxation.
- Each muscle fiber has its own distinct sarcolemma, enabling efficient control of the contractile elements within the muscle cell.
- Damaged muscle cells exhibit impaired function and disruptions to their sarcolemma, requiring the regeneration process for healing to begin.
- Nerve signals induce action potentials across the sarcolemma of a muscle cell, allowing rapid depolarization of the membrane to take place.
- Transverse tubules extend inward from the sarcolemma and into the cell interior to increase surface area and ensure the spread of muscle activation.