Question

synergists (sner-jists; syn = together, erg = work) help prime movers by producing the same (1. ) or by reducing undesirable movements. when a muscle crosses two or more joints, its contraction will cause movement in all the joints crossed unless synergists are there to stabilize them. for example, the flexor (2. ) of the fingers cross both the wrist and the finger joints. you can make a fist without bending your wrist because synergist muscles stabilize the wrist joints and allow the (3. ) mover to act on your finger joints. fixators are specialized synergists. they hold a bone still or stabilize the origin of a prime mover so all the tension can be used to move the (4. ) bone. the postural muscles that stabilize the vertebral column are fixators, as are the muscles that anchor the scapulae to the thorax. in summary, although prime movers seem to get all the credit for causing certain movements, the actions of antagonistic and (5. ) muscles are also important in producing smooth, coordinated, and precise movements. 1. synergistic 2. movement 3. muscles 4. prime 5. insertion 1. prime 2. insertion 3. synergistic 4. movement 5. muscles 1. movement 2. muscles 3. prime 4. insertion 5. synergistic 1. insertion 2. synergistic 3. movement 4. muscles 5. prime 1. muscles 2. prime 3. insertion 4. synergistic 5. movement

Explanation:

Synergists help prime - movers by producing the same movement or reducing unwanted movements. Flexor muscles of fingers cross multiple joints and synergist muscles stabilize the wrist so the prime - mover can act on finger joints. Fixators are specialized synergists that stabilize the origin of a prime - mover so tension can move the insertion bone. Antagonistic and synergistic muscles are important for smooth movements.

Answer:

1. movement
2. muscles
3. prime
4. insertion
5. synergistic