Question

1. which movement is made possible by a hinge joint? 1 point a. rotation of the head b. flexion and extension at the elbow or knee c. circular motion of the shoulder d. side - to - side sliding of wrist bones 12. the ball - and - socket joint allows which type of movement? 1 point a. forward and backward only b. rotation and movement in all directions c. no movement at all d. sliding motion between flat surfaces

Explanation:

• Question 11: Hinge joints, like those at the elbow and knee, allow movement in one plane. Flexion (bending) and extension (straightening) are the primary movements. Rotation of the head is due to pivot joints. Circular motion of the shoulder is from ball - and - socket joints. Side - to - side sliding of wrist bones is from gliding joints.
• Question 12: Ball - and - socket joints, such as the hip and shoulder, have a wide range of motion. They allow rotation and movement in multiple directions (flexion, extension, abduction, adduction, etc.). Forward and backward only is more characteristic of some hinge - like limited movements. No movement is incorrect as ball - and - socket joints are highly mobile. Sliding motion is for gliding joints.

Answer:

1. B. Flexion and extension at the elbow or knee
2. B. Rotation and movement in all directions