Question

an individual picks up a cup and drinks from it. this is an example of __________. a. a concentric contraction because muscles cause the elbow joint and arm to move b. an eccentric contraction because the release of the muscle in the back of the arm causes the elbow to bend c. an isometric contraction because the cup was stationary until the hand picked it up d. a midcentric contraction because the movement took place around the core of the body please select the best answer from the choices provided.

Explanation:

Concentric contraction occurs when a muscle shortens to move a load. When an individual picks up a cup and drinks from it, muscles cause the elbow joint and arm to move, which is a concentric contraction. Eccentric contraction is when a muscle lengthens while under tension, not the case here. Isometric contraction is when muscle tension is generated without a change in muscle length, not applicable as there is movement. There is no such thing as mid - centric contraction in standard muscle contraction terminology.

Answer:

A. a concentric contraction because muscles cause the elbow joint and arm to move