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. a b c d

Explanation:

• Option A: Concentric contraction occurs when a muscle shortens to produce movement (like bending the elbow to lift the cup, as the biceps shorten to move the arm and elbow).
• Option B: Eccentric contraction is muscle lengthening (not the case here as we're lifting, not lowering or releasing to bend in a lengthening way).
• Option C: Isometric contraction is muscle tension without movement (the cup is moved, so not isometric).
• Option D: "Midcentric" is not a standard muscle contraction term; the correct term related to movement around the core isn't applicable here, and the contraction type for lifting is concentric.

Answer:

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