| A | B |
|---|
| skeletal muscle | Voluntary muscle |
| smooth muscle | Involuntary muscle (in walls of digestive tract/blood vessels,etc ) |
| origin | place where muscle attaches to stationary bone |
| insertion | place where muscle attaches to bone that moves on contraction |
| tendons | connective tissue that attaches muscle to bone |
| bursae | fluid-filled sac between tendon and bone |
| actin | protein making up thin fiber filaments of the muscle |
| myosin | protein making up thick filaments of the muscle |
| ATP molecules and calcium ions | requirements for muscle contraction |
| functions of muscular system | movement, posture, heat production |
| prime mover | muscle mainly responsible for a given movement |
| antagonist | muscle that opposes action of prime mover |
| contract | prime mover must do this to produce motion |
| 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 | waste product of muscle metabolism that causes muscle fatigue |
| neuromuscular junction | point of contact between motor neuron and muscle fiber |
| isotonic | muscle shortens and produces movement |
| isometric | muscle tenses and produces no movement |
| pectorals | chest muscle |
| latissimus dorsi | back muscle |
| deltoids | shoulder muscle |
| flexion | movement that makes joint angle smaller |
| extension | movement that makes joint angle larger |
| epimysium | covers the bundles of muscle fibers |
| fascia | connective tissue that covers the muscle |
| synapse | between muscle and nerve neuromuscular junction |
| action potential | electrical message from the nerve moving toward the muscle |
| myoglobin | stored oxygen in muscle |
| glycogen | stored form of glucose in cell |
| deltoid | IM injection site of the arm |
| rectus femoris | muscle site of IM injection site in the anterior leg |
| vastus lateralis | IM injection site in the lateral part of the leg |
| gluteal muscle | muscle of an IM injection site in the hip gluteal muscle |
| Atrophy | muscle wasting |
| myalgia | muscle pain |
