Multiple Choice
Which of the following statements correctly uses directional terms to describe the position of the mouth relative to the nose?
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1. Introduction to Anatomy & Physiology
Directional Terms: Up and Down
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Which action turns the palm of the hand downward?
A
Flexion
B
Extension
C
Supination
D
Pronation
Verified step by step guidance1
Understand the anatomical terms: Flexion refers to bending a joint, Extension refers to straightening a joint, Supination refers to turning the palm upward, and Pronation refers to turning the palm downward.
Identify the movement described in the question: The action of turning the palm downward is specifically referred to as Pronation.
Recall the mechanics of pronation: Pronation occurs at the radioulnar joint, where the radius rotates over the ulna, causing the palm to face downward.
Differentiate between pronation and supination: Supination is the opposite movement, where the palm faces upward, while pronation turns the palm downward.
Confirm the correct answer: Based on the definitions and mechanics, the correct action for turning the palm downward is Pronation.
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