Common symptoms include: 1  Pain or tenderness in your face, jaw joint area, neck and shoulders, and in or around the ear when you chew, speak, or open your mouth wide. 2  Problems when you try to open your mouth wide. 3  Jaws that get stuck or lock in the open-or closed-mouth position.
Fimbriae: 1  Structure: Similar to pili, but shorter and more abundant on the cell surface. 2  Function: Adhesion of cells to surface and formation of pellicles (biofilms) containing thin sheets of cells on a liquid surface.
Mitochondria Structure and Functions. Mitochondria are called the 'powerhouse of the cell'. They contain a number of enzymes and proteins that help process carbohydrates and fats obtained from the food we eat to release energy. Read on to know about the structure and functions of the organelle.lthough mitochondria are present in every cell, they are found in high concentrations in the muscle cells that require more energy. Though the primary function of mitochondria is to produce energy, they also play an important role in the metabolism and synthesis of certain other substances in the body.