Myosin pulls the thin filaments towards the middle on each side, thus shortening the sarcomere and causing contraction. Cross-Bridge Cycling. In the context of muscular contraction, a cross-bridge refers to the attachment of myosin with actin within the muscle cell. All muscle types - whether we're talking about skeletal, cardiac, or smooth - contract by cross-bridge cycling - that is, repeated attachment of actin and myosin within the cell.
Plantain is edible and medicinal, the young leaves are edible raw in salad or cooked as a pot herb, they are very rich in vitamin B1 and riboflavin. The herb has a long history of use as an alternative medicine dating back to ancient times.
Plantain fruits resemble bananas but are longer, have a thicker skin, and contain more starch. They are a major staple in Africa, Latin America, and Asia. They are usually eaten cooked unless they are very ripe. Plantains are especially important in the humid lowlands of West and Central Africa.