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Multiple Choice
Which of the following is true about the shoulder joint?
A
It is stabilized primarily by the femur and tibia.
B
It is the most mobile joint in the human body.
C
It connects the humerus to the sternum.
D
It is a hinge joint that allows movement in only one plane.
Verified step by step guidance
1
Step 1: Begin by identifying the anatomical structure of the shoulder joint. The shoulder joint, also known as the glenohumeral joint, is formed by the articulation of the head of the humerus and the glenoid cavity of the scapula.
Step 2: Understand the type of joint the shoulder is classified as. The shoulder joint is a ball-and-socket joint, which allows movement in multiple planes, including flexion, extension, abduction, adduction, rotation, and circumduction.
Step 3: Compare the mobility of the shoulder joint to other joints in the human body. The shoulder joint is the most mobile joint due to its ball-and-socket structure and the relatively shallow glenoid cavity, which permits a wide range of motion.
Step 4: Evaluate the incorrect options. The femur and tibia are part of the lower limb and do not stabilize the shoulder joint. The humerus connects to the scapula, not the sternum. Additionally, the shoulder is not a hinge joint, as hinge joints (e.g., the elbow) allow movement in only one plane.
Step 5: Conclude that the correct statement is: 'It is the most mobile joint in the human body,' based on its anatomical structure and function.