Cartilage is ____ tissue that gives shape to structures such as the ears and nose. 

An injury that occurs away from the force of impact is caused by:

A. twisting force. B. Dissipated force. C. Indirect force, D. Direct force.

Which of the following statements regarding the biological effect mechanisms of the direct theory is false?

A) Most dental x-ray photons pass through the cell, causing no damage. B) X-ray photons may collide with important cell chemicals and break them apart. C) Ionization can cause critical damage to large molecules. D) Irradiated cells cannot be repaired.