Answer:
Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as by holding a heavy book or a dumbbell at the same position. The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state.
Explanation:
Answer:
2(x+3)+4(5+x)
2x+6+20+4x
6x +80
Explanation:
1.Distribute
2.Add x bc x can't add to normal #'s
3.Add normal #'s
4. Then you get : 6x+80 Bc you can't add these together
