are There are many nuclei present in the motor end plate of a mucle
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The model illustrates a section of a muscle and its neuromuscular end plate magnified approximately 10,000 times. It is a giant cell (1-10 cm long and up to 0.1 mm thick) with many nuclei. Its chief functional element is formed by myofibrils. These structures are made of thick filaments and thin filaments and are surrounded by the sarcoplasmic reticulum. The characteristic longitudinal striping is caused by the specific arrangement of the filaments. The thick filaments form the A band. The thin filaments form the I band. The Z line (intermediate stripe) runs through its center. The section between two Z lines is called the sarcomere. Starting from the Z line, the cytoplasm is run through by membranous tubes, called the T-tubules, which together with the sarcoplasmic reticulum form a triad. The nuclei are situated in the cell periphery. The mitochondria, known as the "power plants of the cells," run parallel to the myofibrils. The neuromuscular end plate is the name of the area in which a motor ending is in contact with the muscle cell. The ending is covered by a Schwann cell. The synaptic cleft lies between the muscle cell and the ending. The ending contains mitochondria as well as vesicles that are filled with transmitter substances (usually).
Adi S.
This slide shows where nervous tissue meets skeletal muscle tissue within muscle. Multiple neuromuscular junctions are visible. Observe an axon, synaptic terminal, muscle fiber, and sarcolemma. Does each motor neuron appear to be stimulating a single muscle fiber or multiple muscle fibers on this slide? The combination of a single motor neuron and all muscle fibers that it stimulates is called a ________. The area on a muscle fiber that is directly stimulated by a synaptic terminal is called the ________. Locate any dark, grainy structures that may be visible in the synaptic terminal. What are these structures called and what substance do they contain?
Madhur L.
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