What bone cells respond to stress ?

Bone changes its molphology and density in response to the physical circumstances such as mechanical stress. Bone tissue remodeling is regulated by the cells in bone: osteoblasts, osteoclasts and their progenitors.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

answer///terminator or twilight zone;