| A | B |
|---|
| Which muscles are not in our control? | involuntary muscles |
| What is the waste product that causes muscle soreness? | lactic acid |
| Which type of muscle is under your control? | skeletal muscles |
| Which muscles are found in your body organs? | smooth muscles |
| tough chords of tissue that attach muscles to bones | tendons |
| muscles always _____ bones | pull |
| stretching or tearing of a ligament | sprain |
| a tear or overstretching of a muscle or tendon | strain |
| a strong contraction of a muscle | cramp |
| Which type of muscle is found only in the heart? | cardiac muscle |
| What forms muscles? | muscle fiber bundles |
| when muscles are contracted. they are _____ and bulged | shorter |
| When muscles are relaxed, they are ___ and thinned | longer |
| a muscle that causes a joint to bend | flexor |
| a muscle that causes a joint to extend | externsor |
| the lines formed where actin is anchored in myofibrils | z lines |
| the functional unit in a myofibril; shorten during contraction | sarcomeres |
| the thin protein filament | actin |
| the thick protein filament | myosin |
| alternating dark/light bands in muscle tissue | striations |
