11. Eccentric contraction is (1 point)
O a lengthening motion of the muscle
O a shortening motion of the muscle
O the motion of a working muscle
O
a steady motion that engages the muscle without contraction

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.

answer (c) by causing social withdrawal;

the right answer is: time