| Answer | Crossword Clue |
|---|---|
| MYOSIN | Muscle-contraction protein |
| ACTIN | Muscle protein |
| MYOSIN | Muscle protein |
| MYOSIN | Common muscle protein |
| SPASM | Muscle contraction |
| TIC | Muscle contraction |
| SPASM | Sudden muscle contraction |
| SPASM | Involuntary muscle contraction |
| ATP | Muscle contraction chem. |
| SPASM | Involuntary contraction of a muscle. |
| ATP | Need for muscle contraction, briefly |
| MOTORNEURON | Spinal cord cell needed for muscle contraction |
