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) the additional joint present doubles the range of motion
B) articular cartilage at bone ends is replaced with hyaline cartilage
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

Being "double-jointed" actually means that the joint capsules and ligaments are more stretchy and loose than normal, allowing for a greater range of motion. This is why people with this trait can often contort their bodies in unusual ways or bend their joints further than others.

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