A lack of exercise could
a. cause bones to become longer.
b. result in porous and weak bones.
c. cause bones to lose their medullary cavity.
d. cause bones to become thicker.
e. cause bones to store more calcium.

Jessica is a friend dislodge a piece of meat from her throat. she delivers five blows on her friend’s back with her fist and then gives him five abdominal thrusts. is jessica doing the procedure correctly? 1 no, she should use the heel of her hand for the blows. 2 no, she should use the side of her hand for the blows. 3 no, she should use her elbows to deliver the blows. 4 no, she should use a tennis ball to deliver the blows.