Question

The arms cannot be bent backwards at the elbow joint _____.

• A. because it is a pivot joint
• B. because it is a ball and socket
• C. because it is a hinge joint
• D. because it is a gliding joint

Answer 1

The correct option is C

because it is a hinge joint

The arms cannot be bent backwards at the elbow joint because elbow joint is a hinge joint. Hinge joints are joints like door hinge where only back and forth movement is possible. These are found in fingers and toes, knee, elbow, etc. Whereas gliding joint and ball and socket joint allow backwards, forward, sideways movements. Pivot joint shows rotating movement along with forward, backward and sideways moments.