An individual with a "double-jointed" thumb can pull it back towards the wrist much farther than normal. What does it mean to be "double-jointed?"
A) articular cartilage at bone ends is replaced with hyaline cartilage
B) the additional joint present doubles the range of motion
C) greater than normal production of serous fluid lubricates the joint and extends it
D) the joint capsules and ligaments are more stretchy and loose than normal

Question

Quizplus · Accepted Answer

"Double-jointed" is not actually a medical or anatomical term, and refers to individuals who have joints that can move beyond the normal range of motion. This is often due to looser joint capsules and ligaments, allowing for greater flexibility.

An Individual with a "Double-Jointed" Thumb Can Pull It Back