Answer to Question 1
ANS: C
Three-dimensional mapping is done with holograms and is being studied for application in brain mapping and tumor diagnosis.
Answer to Question 2
ANS:
tension, compression
compression, tension
External fixation applies tension and compression forces to bone. Tension stimulates bone growth. Compression helps control infection and promotes union in fractures without bone loss. External fixators also can be used for correcting bone deformities and for lengthening the femur and tibia after osteotomy for limb length discrepancy.