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Multiple Choice
Which type of joint allows movement around only one axis?
A
Saddle joint
B
Ball-and-socket joint
C
Gliding joint
D
Hinge joint
Verified step by step guidance
1
Step 1: Understand the concept of joint types in the human body. Joints are classified based on their structure and the type of movement they allow. Examples include hinge joints, ball-and-socket joints, saddle joints, and gliding joints.
Step 2: Focus on the hinge joint. A hinge joint is a type of synovial joint that allows movement primarily in one plane, similar to the motion of a door hinge. This movement is around a single axis.
Step 3: Compare hinge joints to other types of joints mentioned in the problem. For example, ball-and-socket joints allow movement in multiple axes and planes, saddle joints allow movement in two planes, and gliding joints allow sliding movements but not rotation around an axis.
Step 4: Identify examples of hinge joints in the human body. Common examples include the elbow joint (between the humerus and ulna) and the knee joint (between the femur and tibia). These joints allow flexion and extension movements around one axis.
Step 5: Conclude that the hinge joint is the correct answer because it is the only type of joint listed that allows movement around only one axis.