KINESIOL 1A03 Lecture Notes - Lecture 19: Action Potential, Calcium Atpase, Myofilament
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Body movement: because they all attach to bone. Production of body heat: because skeletal muscles use energy, heat is a by-product of breaking down atp. The ability of a muscle to shorten forcefully: produces a tension which produces a force. The capacity for muscle to respond to a stimulus: skeletal muscles can only respond to neurotransmitters, cardiac and smooth muscle can also respond to changes in ph and hormones. Muscle can be stretched beyond its resting length and still be able to contract: resting condition is usually the optimal length to produce a force, the range is restricted by bone. The ability to bounce back to resting length after stretched: you can only contract muscle a(cid:374)d ca(cid:374)"t rela(cid:454) it, you can only relax muscle through gravity or contracting the opposing muscle. Long, cylindrical, multinucleated cells: they are multinucleated due to the fusion of myoblasts.