In the classification of joints, which of the following is TRUE?
Synarthrotic joints are slightly movable.
All synovial joints are freely movable.
A gomphosis is a freely movable joint.
In cartilaginous joints, a joint cavity is present.
Immovable joints are called amphiarthroses.
The Correct Answer is B
Choice A reason: Synarthrotic joints are immovable, not slightly movable. Examples include sutures in the skull. They are designed for stability rather than movement.
Choice B reason: Synovial joints are the only type of joint that is always freely movable. They include hinge joints (e.g., elbow), ball-and-socket joints (e.g., shoulder), and others that allow a wide range of motion due to the presence of a synovial cavity and lubricating fluid.
Choice C reason: A gomphosis is a type of fibrous joint found between teeth and their sockets. It is immovable and not freely movable.
Choice D reason: Cartilaginous joints do not have a joint cavity. They are connected entirely by cartilage and allow limited movement, such as the intervertebral discs and the pubic symphysis.
Choice E reason: Immovable joints are called synarthroses, not amphiarthroses. Amphiarthroses are slightly movable joints, such as those between vertebrae.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is False
Explanation
Choice A reason: This statement is incorrect. In anatomical position, the palms face forward (supinated), not backward (pronated). Pronated palms would indicate a rotated forearm, which is not the standard anatomical reference.
Choice B reason: This is correct. Anatomical position is defined with the body standing upright, feet together, arms at the sides, and palms facing forward. This orientation ensures consistency in anatomical terminology and reference.
Correct Answer is C
Explanation
Choice A reason: Circumduction is a circular movement that combines flexion, extension, abduction, and adduction. It is typically seen in ball-and-socket joints like the shoulder or hip, not in the neck. It does not describe the backward bending of the head.
Choice B reason: Rotation refers to the movement of a bone around its longitudinal axis, such as turning the head side to side. It does not involve bending the head backward.
Choice C reason: Hyperextension occurs when a joint is extended beyond its normal anatomical position. In the case of the head, bending it backward past the neutral anatomical position is a classic example of hyperextension.
Choice D reason: Flexion is the movement that decreases the angle between two body parts, such as bending the head forward toward the chest. It is the opposite of the movement described in the question.
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