2. The primary action of the hamstrings muscle group is______________________ of the lower leg at the knee. The group incomposed of the following muscles:___________________________________,________________________________________, and_________________________________________. 3. The Gastrocnemiusmuscle acts to mainly ______________________ flex the foot at theankle. Its main (opposing action) _________________________________muscle is the ____________________ ______________________, whichmainly ______________________ flexes the foot at the ankle. 4. TheBiceps brachii muscle ________________ the forearm at the elbow.The insertion of this muscle is on the ___________________. Themain forearm extensor muscle is the ________________________________________, and it inserts on the______________________________. 5. The pectoral muscles have theirorigin in the _______________ and _______________, and insertion onthe ______________________. Their main action is to________________ and medially _________________ the arm. 6. Theabdominal muscles protect the abdominopelvic cavity and also______________ and __________________ the trunk. 7. What is thefunction of lumbodorsal fascia
