Exam 11: A: Anatomy of the Muscular System

When a muscle contracts,the part of the body that moves is usually distal to the belly of the muscle.

Muscles that move the forearm are found proximal to the elbow.

The circulatory system is responsible for muscle tone.

There are more than twice as many muscles as there are bones in the body.

To stabilize a joint,the antagonist must contract while the prime mover contracts.

The difference between a tendon and an aponeurosis is that a tendon is made of connective tissue and an aponeurosis is made of muscle tissue.

A set of scales and a pair of scissors are both examples of second-class levers.

Most muscles span a joint.

Poor posture puts abnormal strain on bones and may eventually produce deformities.

The insertion is that point of attachment that does not move when the muscle contracts.

Four muscles,the deltoid,supraspinatus,infraspinatus,and the teres minor,make up what is called the rotator cuff around the shoulder.

Antagonist muscles oppose the movement of the agonist muscle.

The muscles of facial expression are unique in that at least one of their points of attachment is to the deep layers of skin over the face or neck.

Muscles maintain posture by the property of tonicity.

There are more than 600 muscles in the body.

Intrinsic foot muscles are responsible for movement of the ankle and foot.

A synergist muscle can be defined as a muscle that facilitates or compliments the prime mover.

In a lever system,the fixed pivot around which the rod moves is called the fulcrum.

Agonists and prime movers are interchangeable terms.

The sartorius is an example of a unipennate muscle.