Examples of sarcolemma in the following topics:
- It is the link (transduction) between the action potential generated in the sarcolemma and the start of a muscle contraction .
- The area of the sarcolemma on the muscle fiber that interacts with the neuron is called the motor-end plate.
- The motor end plate possesses junctional folds: folds in the sarcolemma that create a large surface area for the neurotransmitter to bind to receptors.
- The depolarization then spreads along the sarcolemma and down the T tubules, creating an action potential.
- The sarcolemma of myocytes contains numerous invaginations
(pits) called transverse tubules which are usually perpendicular to the length
of the myocyte.
- Myofibrils run parallel to the myocyte and typically run for its entire length, attaching to the sarcolemma at either end.
- A skeletal muscle cell is surrounded by a plasma membrane called the sarcolemma with a cytoplasm called the sarcoplasm.
- Each muscle fiber connects to the plasma membrane (sarcolemma) with distinctive tubules (T-tubule).
- At these T-tubules, the sarcolemma is studded with a large number of calcium channels which allow calcium ion exchange at a rate much faster than that of the neuromuscular junction in skeletal muscle.
- These cells remain adjacent to a muscle fiber, situated between the sarcolemma and the endomysium (the connective tissue that divides the muscle fascicles into individual fibers).
- Satellite cells are located between the basement membrane and sarcolemma (cell membrane) of individual muscle fibers.
- Detailed view of a neuromuscular junction: 1) Presynaptic terminal; 2) Sarcolemma; 3) Synaptic vesicle; 4) Nicotinic acetylcholine receptor; 5) Mitochondrion.
- When stimulated, a signal transduction cascade leads to increased intracellular calcium from the sarcoplasmic reticulum through IP3 mediated calcium release, as well as enhanced calcium entry across the sarcolemma through calcium channels.
- Sarcomeres are connected to a plasma membrane, called a sarcolemma, by T-tubules, which speed up the rate of depolarization within the sarcomere.