Home › CBSE Class 9 › biology › c9skeletaljoints › Per NCERT, the ELBOW (and the KNEE) are examples…
Per NCERT, the ELBOW (and the KNEE) are examples of which type of joint?
AFixed joint
BHinge joint — bends and straightens in ONE direction only, like a door hinge
CPivot joint
DBall and socket joint
Answer & Solution
Correct answer: B. Hinge joint — bends and straightens in ONE direction only, like a door hinge
Per NCERT §3.5.2, elbow + knee are hinge joints — one-axis bending. The other joints allow different motions.
Related questions
Per NCERT, what is TOTIPOTENCY — referenced in the 'Think as a Scientist' box about F. C. Per NCERT, what percentage of TOTAL BODY WEIGHT is contributed by the adult human SKELETONPer NCERT, why is the RIB CAGE flexible — and what advantage does this give?Per NCERT, the rib cage attaches to the spine at the back and to which bone at the front?Per NCERT, how many PAIRS of RIBS does an adult human have?Per NCERT, what is the VERTEBRAL COLUMN (backbone / spine) made of?Per NCERT, what is the function of CARTILAGE in joints?Per NCERT, the joints between the BONES OF THE SKULL are which type?