Briefly explain why the elbow is a more stable hinge joint than the knee
What will be an ideal response?
Both the elbow and knee are hinge joints. The articular capsule of the elbow encloses both of the articulations between the humerus, ulna, and radius. The articulating surfaces of the humeroulnar joint fit together snugly, further stabilizing the joint and reducing its mobility. In addition to flexion and extension, the knee can also perform some degree of rotation and lateral gliding when flexed. There is a tradeoff of stability that comes with a greater amount of mobility, as seen in the knee joint. The knee joint also lacks a continuous articular capsule that could have provided increased stability to the joint.
You might also like to view...
Which of the following choices is FALSE? Mammalian rods and cones differ in that, rods
A) Have fewer types of photopigment than cones. B) Have a slower response time than cones. C) Function better than cones in bright light. D) Integrate signals over a longer period than cones.
Connexons are carbohydrate building blocks of gap junctions that allow ions to pass from the cytosol of one cell into the cytosol of an adjacent cell
Indicate whether the statement is true or false
During ejaculation, the sphincter at the neck of the bladder reflexively opens to allow semen to enter the urethra
Indicate whether the statement is true or false
Destruction of red bone marrow due to radiation results in
a) hemorrhagic anemia. b) aplastic anemia. c) megaloblastic anemia. d) pernicious anemia. e) iron deficiency anemia.