1. TERMS RELATING TO MUSCLES Muscles attach to at least two bones. Origin-the attachment of a muscle to the less movable bone. Usually near the axial skeleton. Insertion-the attachment of a muscle to the more movable bone. Usually near the appendicular skeleton. Action-the movement produced by a muscle.

2. Movements at Muscles Movements require at least two muscles that work together. Prime Mover-the muscle that produces a desired action. This muscle contracts. Antagonist-the muscle that relaxes during a muscle contraction. Synergists-steady the movements of prime mover.

3. (a) (b) (e) (d) (g) (f) (c) (a)Circular (orbicularis oris) (b) Convergent (pectoralis major) (c) Parallel (sartorius) (d) Unipennate (extensor digitorum longus) (f) Fusiform (biceps brachii) (g) Multipennate (deltoid) (e) Bipennate (rectus femoris)

4. Shoulder Arm Forearm Pelvis/thigh Thigh Leg Head Facial Neck Thorax Abdomen Thigh Leg Trapezius Deltoid Triceps brachii Biceps brachii Brachialis Pronator teres Brachioradialis Flexor carpi radialis Palmaris longus Iliopsoas Pectineus Rectus femoris Vastus lateralis Vastus medialis Fibularis longus Extensor digitorum longus Tibialis anterior Temporalis Epicranius, frontal belly Orbicularis oculi Zygomaticus Orbicularis oris Sternohyoid Sternocleidomastoid Pectoralis major Pectoralis minor Serratus anterior Intercostals External oblique Rectus abdominis Internal oblique Transversus abdominis Sartorius Tensor fasciae latae Adductor longus Gracilis Gastrocnemius Soleus Masseter Platysma

5. Arm Triceps brachii Brachialis Forearm Brachioradialis Extensor carpi ulnaris Extensor digitorum Iliotibial tract Leg Gastrocnemius Soleus Fibularis longus Neck Epicranius, occipital belly Sternocleidomastoid Trapezius Shoulder Hip Gluteus medius Gluteus maximus Thigh Biceps femoris Adductor magnus Semitendinosus Semimembranosus Latissimus dorsi Rhomboid major Infraspinatus Deltoid Teres major Flexor carpi ulnaris Extensor carpi radialis longus Calcaneal (Achilles) tendon Hamstrings: