Question

in the classification of joints, which of the following is true? a) immovable joints are called amphiarthroses. b) synarthrotic joints are slightly movable. c) in cartilaginous joints, a joint cavity is present. d) all synovial joints are freely movable.

Explanation:

• Immovable joints are called synarthroses, not amphiarthroses. Amphiarthroses are slightly - movable joints. So A is incorrect.
• Synarthrotic joints are immovable, not slightly movable. So B is incorrect.
• Cartilaginous joints do not have a joint cavity. Synovial joints have a joint cavity. So C is incorrect.
• Synovial joints are characterized by being freely movable due to the presence of a synovial cavity filled with synovial fluid that lubricates and allows for a wide range of motion. So D is correct.

Answer:

D. All synovial joints are freely movable.