| A | B |
|---|
| smooth muscle | found in walls of digestive tract/blood vessels |
| motion is voluntary in this muscle | skeletal muscle |
| motion is involuntary in this muscle | cardiac muscle, smooth muscle |
| tendons | connective tissue that attaches muscle to bone |
| tendon sheath | fluid-filled tube enclosing some tendons |
| bicep | muscle in anterior upper arm that is prime mover in flexion of lower arm |
| tricep | muscle in posterior upper arm that is antagonist in flexion of lower arm |
| fatigue | caused by repeated muscle contraction without rest |
| lactic acid | builds up in muscles during rapid exercise |
| pectorals "pecs" | chest muscle |
| latissimus dorsi "lats" | back muscle |
| deltoids "delts" | shoulder muscle |
| flexion | movement that makes joint angle smaller |
| extension | movement that makes joint angle larger |
