Massachusetts Comprehensive Assessment System (MCAS) Biology Practice Test

How do less elastic ligaments affect joint movement?

1. They increase joint flexibility

2. They limit the movement of the joint

3. They enhance the strength of the joint

4. They have no impact on joint movement

The correct answer is: They limit the movement of the joint

Less elastic ligaments play a crucial role in stabilizing joints by connecting bones to one another and limiting their movement. When ligaments are less elastic, they become stiffer and do not allow for the same range of motion as more elastic ligaments. This rigidity helps to maintain the structural integrity of the joint, preventing excessive movement that could lead to injury. Therefore, less elastic ligaments limit the movement of the joint, ensuring that it functions within a safe and controlled range. This is particularly important in areas of the body where stability is vital for overall function, such as the knee or ankle. The other options suggest different impacts of ligaments on joint movement. Some posit that less elastic ligaments could increase flexibility or enhance joint strength; however, this overlooks the fact that elasticity is key for proper movement dynamics. Additionally, stating that they have no impact contradicts the fundamental role ligaments play in joint stability and movement control.