Question

The joint of radio ulna with upper arm is
A.Hinge joint
B.Gliding joint
C.Socket joint
D.Pivot joint

Answer 1

Hint: The structural arrangement of tissues which connect two or more bones together at their place of meeting is called joint. The study of joints is called arthrology.

Complete answer:
Each arm consists of 30 bones, namely humerus in the upper arm, radius and ulna in the forearm, 8 carpals in the wrist, 5 metacarpals in the palm, and 14 phalanges in the fingers
The distal phalanx supports broad, arched, horny nails. The radius and ulna are so arranged in the forearm as to allow the radius to rotate around the ulna. This arrangement makes the arm’s forearm very flexible.Many small bones in the wrist and hand allow us to hold objects and to make delicate hand movements such as those in writing, sewing, painting etc.
The joint of the radioulnar with upper arm is hinge joint. This joint allows movements in one plane only. One edge of the socket is prolonged to check the movement of the ball in that direction.The knee joint, elbow joint, ankle joint and joints between the phalanges are of this type.

So, the correct answer is option A. Hinge joint
Additional information:
Functions of joint :
-Many joints permit movement between the opposed surfaces of the bones they connect but this is not essential as a joint may be immovable.
-Some joints allow the growth of the structures they connect.
-The joints make the body flexible..

Note:
There are three main types of joints: fibrous, fixed, or immovable: cartilaginous, or slightly moveable; and synovial, or freely movable. Hinge joints is a type of synovial joint.