Which of the following are true regarding resting sarcomere length and generating force in muscle contraction? Select all that apply.
1.Having enough overlap of myofilaments with room to shorten is essential for strong contractions of sarcomere
2.Having excessive overlap of myofilaments produces strong contractions because there are more cross-bridges formed
3.Having very little overlap produces strong contractions because there is more room for the sarcomere to shorten
4.Optimal sarcomere length for generating force is between 80-120% or resting length