MICROANATOMY

Detailed explanation-1: -The sarcolemma (sarco (from sarx) from Greek; flesh, and lemma from Greek; sheath) also called the myolemma, is the cell membrane surrounding a skeletal muscle fiber or a cardiomyocyte. It consists of a lipid bilayer and a thin outer coat of polysaccharide material (glycocalyx) that contacts the basement membrane.

Detailed explanation-2: -The sarcolemma is a specialized cell membrane which surrounds striated muscle fiber cells. Sometimes called the myolemma, the sarcolemma is similar to a typical plasma membrane but has specialized functions for the muscle cell.

Detailed explanation-3: -The ACh diffuses across the synaptic cleft, binding to acetylcholine receptors on the ligand-gated ion channels (nicotinic type I) in the sarcolemma of the post synaptic tissue, the muscle fiber. This specialized region of the sarcolemma is known as the motor end plate, and this is the location of the ACh receptors.

Detailed explanation-4: -The sarcolemma is also called the myolemma and is the cell membrane of a striated muscle fiber cell. The function of the sarcolemma is same as that of the plasma membrane of the eukaryotic cells. Thus, the correct answer is option (B), ‘Muscle fibres’.