Synarthrotic joints __________.
Can be dislocated easily
Are freely movable
Are slightly movable
Are immovable
The Correct Answer is D
Choice A reason: Synarthrotic joints are structurally designed to be immobile, often found in areas like the skull where bones are tightly joined by fibrous tissue. Because of their rigidity and lack of movement, they are not prone to dislocation.
Choice B reason: Freely movable joints are classified as diarthroses, such as the shoulder or knee. Synarthrotic joints are the opposite, offering no movement between the bones.
Choice C reason: Slightly movable joints are called amphiarthroses, such as the joints between vertebrae. Synarthrotic joints do not allow even slight movement.
Choice D reason: Synarthrotic joints are immovable joints where bones are connected by fibrous tissue or cartilage. Examples include sutures in the skull. Their primary function is protection and structural stability.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Supraspinatus is one of the four rotator cuff muscles. It originates from the supraspinous fossa of the scapula and inserts on the greater tubercle of the humerus, aiding in shoulder abduction and stabilization.
Choice B reason: Infraspinatus is a rotator cuff muscle that originates from the infraspinous fossa of the scapula and inserts on the greater tubercle of the humerus. It functions in external rotation of the shoulder.
Choice C reason: Rhomboid minor is not part of the rotator cuff. It is located in the upper back and functions to retract the scapula. It does not attach to the humerus or contribute to shoulder joint stabilization.
Choice D reason: Teres minor is a rotator cuff muscle that originates from the lateral border of the scapula and inserts on the greater tubercle of the humerus. It assists in external rotation and stabilization of the shoulder.
Choice E reason: Subscapularis is the fourth rotator cuff muscle. It originates from the subscapular fossa and inserts on the lesser tubercle of the humerus, functioning in internal rotation of the shoulder.
Correct Answer is B
Explanation
Choice A reason: Symphyses are cartilaginous joints where bones are joined by fibrocartilage. They allow limited movement, such as in the pubic symphysis, but are not the most movable joints.
Choice B reason: Synovial joints are the most movable type of joints in the human body. They feature a joint cavity filled with synovial fluid, articular cartilage, and a fibrous capsule, allowing for a wide range of motion. Examples include the shoulder, hip, and knee joints.
Choice C reason: Syndesmoses are fibrous joints where bones are connected by ligaments or interosseous membranes. They allow more movement than sutures but are still relatively limited compared to synovial joints.
Choice D reason: Gomphoses are immovable joints found between teeth and their sockets. These joints are highly stable but do not permit movement.
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