Which option is NOT one of the five tissue loading types?

Which option is NOT one of the five tissue loading types?

• A. Friction
• B. Tension
• C. Compression
• D. Shearing

Answer: (A)

When we talk about how tissues deform under load, we categorize the forces by the way the tissue actually stretches or compresses. The standard modes describe deformation inside the tissue: tension pulls fibers apart, compression pushes them together, shear makes layers slide past each other, bending combines tension on one side with compression on the other, and torsion twists the tissue around its axis. Friction, however, is a surface interaction that resists sliding between contacting surfaces; it isn’t a fundamental deformation mode of tissue itself. So friction isn’t counted among the five tissue loading types. The other options illustrate real deformation modes: tension, compression, shear, bending, and torsion.

When we talk about how tissues deform under load, we categorize the forces by the way the tissue actually stretches or compresses. The standard modes describe deformation inside the tissue: tension pulls fibers apart, compression pushes them together, shear makes layers slide past each other, bending combines tension on one side with compression on the other, and torsion twists the tissue around its axis. Friction, however, is a surface interaction that resists sliding between contacting surfaces; it isn’t a fundamental deformation mode of tissue itself. So friction isn’t counted among the five tissue loading types. The other options illustrate real deformation modes: tension, compression, shear, bending, and torsion.