11.2 True/False Questions
1) The elbow joint is an example of a fulcrum as the biceps brachii flexes the forearm.
2) In both parallel and unipennate muscles, the muscle fibers extend the length of the muscle, from origin to insertion.
3) The prime mover is also known as the antagonist.
4) When a prime mover is contracted, the antagonists are stretched, but typically relaxed.
5) Interestingly, some synergists may act by cancelling out some of the actions of a prime mover.
6) Third-class lever systems, like most skeletal muscles, enable great strength but sacrifice speed and distance of movement.
7) Muscles arise from the mesoderm in the embryo.
8) Muscles of the pharyngeal arch muscle group include muscles of facial expression and chewing muscles.
9) In anatomical position, the pronator teres, the brachioradialis, and the extensor carpi radialis all lie on the anterior surface of the forearm.
10) The hamstrings consist of the biceps femoris, the semitendinosus, and the semimembranosus.