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Chapter 9: Q18 CQ (page 315)

Suppose the biceps muscle was attached through tendons to the upper arm close to the elbow and the forearm near the wrist. What would be the advantages and disadvantages of this type of construction for the motion of the arm?

Short Answer

Expert verified

The advantage is the movement of elbow is lifting more weight than usual and the disadvantage is that bending of elbow will get tougher.

Step by step solution

01

Motion

A body's position or orientation changes throughout time, which is known as motion. The motion of animals and humans, for example, is a continual movement in this universe.

02

Advantage

The mechanical advantage changes if the load arm and the effort arm change.

If the biceps muscles are attached to the elbow close to the elbow and the forearm near the wrist, the effort arm's length decreases. The arm can lift more load than usual. It is an advantage.

03

Disadvantage

The bending of the elbow gets more challenging due to the close bending of the biceps muscle. This is one disadvantage.

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