| A | B |
|---|
| Label the parts of the sarcomere |  |
| Label the parts of the actin myofilament |  |
| Highly organized units made of actin and myosin which are joined end to end to form the myofibrils | sarcomere |
| Which is made of Actin and Myosin protein components of muscle fibers? | myofilament |
| Name of the threadlike fiber extending from one end of the muscle to the other? | myofibril |
| Name the plasma membrane of a muscle fiber: | sarcolemma |
| What are the three major muscle types? | smooth, cardiac, skeletal |
| The ability of muscle to recoil to its original length after it has been stretched | elasticity |
| The ability of a muscle to be stretched beyond its normal resting length and is still able to contract | extensibility |
| The capacity of muscle to respond to stimulus | excitability |
| What are the functions of the muscular system? | Body movement, maintain posture, respiration, production of body heat, communication, constriction of organs like the heart |
| The ability of muscle to shorten forcefully | contractility |
