What Is the Action of the Muscle Labeled I

question 47

Multiple Choice

What is the action of the muscle labeled I?

• A)extends the forearm at the elbow joint
• B)flexes the forearm at the elbow joint
• C)pronates the forearm at the radioulnar joints
• D)abduct arm at shoulder joint
• E)rotates arm at shoulder joint

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Definitions:

Infarction

The death of tissue due to a lack of blood supply, often resulting from a blockage in the vasculature serving the affected area.

Fibrillation

A rapid, irregular, and unsynchronized contraction of muscle fibers, particularly in the heart.

Ventricles

The two lower chambers of the heart, or the central cavities in the brain.

Capillaries

The smallest blood vessels in the body, connecting arteries to veins, which facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrient and waste substances between blood and surrounding tissues.