Question

multiple choice question
joints in which a small projection of a bone turns within a ring formed of bone or ligament is a ______ joint.
plane
pivot
ball - and - socket
hinge

Explanation:

A pivot joint is characterized by a small projection of a bone turning within a ring formed of bone or ligament. Plane joints allow gliding movements, ball - and - socket joints have a ball - like end of one bone fitting into a cup - like socket of another, and hinge joints allow movement like a door hinge (flexion and extension).

Answer:

B. pivot