Question

structural classification – what type of structural joint is found at the skull sutures? * 1 point
a) synovial
b) fibrous
c) cartilaginous
d) ball-and-socket
structural classification – which synovial joint type allows the greatest range of motion (e.g., shoulder, hip)? * 1 point
a) hinge
b) ball-and-socket
c) saddle
d) pivot

Explanation:

First Question (Skull Sutures Joint Type)

Skull sutures are fibrous joints as they are connected by dense fibrous connective tissue with little to no movement. Synovial joints are freely movable (e.g., knee), cartilaginous joints have cartilage (e.g., intervertebral discs), and ball - and - socket is a type of synovial joint (not for skull sutures).

Ball - and - socket joints (like shoulder, hip) allow movement in multiple planes (flexion, extension, abduction, adduction, rotation, circumduction), giving the greatest range of motion. Hinge joints (e.g., elbow) allow only angular motion in one plane, saddle joints have limited motion, and pivot joints allow rotation around one axis.

Answer:

b) Fibrous

Second Question (Synovial Joint with Greatest Range of Motion)