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What type of stretching involves contracting a muscle prior to stretching it?
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10. Muscles
Muscle Actions
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Which of the following muscles is primarily responsible for flexing the forearm at the elbow joint?
A
Triceps brachii
B
Pectoralis major
C
Biceps brachii
D
Deltoid
Guida verificata passo dopo passo1
Begin by understanding the anatomy of the elbow joint and the muscles involved in its movement. The elbow joint is a hinge joint that primarily allows for flexion and extension of the forearm.
Identify the muscles listed in the problem: Triceps brachii, Pectoralis major, Biceps brachii, and Deltoid. Each of these muscles has specific functions related to movement.
Consider the function of each muscle: The Triceps brachii is responsible for extending the forearm at the elbow joint. The Pectoralis major is involved in movements of the shoulder, such as adduction and rotation. The Deltoid is primarily responsible for shoulder abduction.
Focus on the Biceps brachii: This muscle is located in the upper arm and is primarily responsible for flexing the forearm at the elbow joint. It works by contracting and pulling the forearm upwards, decreasing the angle between the forearm and the upper arm.
Conclude that the Biceps brachii is the correct muscle responsible for flexing the forearm at the elbow joint, as it is specifically designed for this action, unlike the other muscles listed.
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