Identify the structure in the diagram below
The Correct Answer is ["Ulna bone"]
The ulna is one of the two bones of the forearm, located on the medial (inner) side of the arm.
It is a long bone that runs parallel to the radius bone, extending from the elbow joint to the wrist joint.
The ulna features several surface landmarks, including the olecranon process, which forms the bony tip of the elbow.
The bone is also involved in the formation of the elbow joint, where it articulates with the humerus bone, and the wrist joint, where it articulates with the radius bone and several carpal bones.
The ulna is an important site for the attachment of muscles involved in forearm and wrist movements.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["Radial flexion of the wrist"]
Explanation
Radial flexion of the wrist, also known as radial deviation, refers to the movement of the wrist towards the radial (thumb) side of the forearm.
This movement is achieved by the contraction of muscles on the lateral (thumb) side of the forearm.
The joint involved in radial flexion of the wrist is the radiocarpal joint, which is a condyloid joint formed by the articulation between the distal end of the radius bone and the carpal bones of the wrist.
This joint allows for a range of movements, including:
1. Ulnar flexion of the wrist: This refers to the movement of the wrist towards the ulnar (little finger) side of the forearm, which is achieved by the contraction of muscles on the medial (little finger) side of the forearm.
2. Extension of the wrist: This refers to the movement of the wrist backward, away from the palm of the hand.
This movement is achieved by the contraction of muscles on the back of the forearm.
3. Flexion of the wrist: This refers to the movement of the wrist forwards, towards the palm of the hand.
This movement is achieved by the contraction of muscles on the front of the forearm.
4. Adduction of the wrist: This refers to the movement of the wrist towards the midline of the body, which is achieved by the contraction of muscles on the medial (little finger) side of the forearm.
5. Abduction of the wrist: This refers to the movement of the wrist away from the midline of the body, towards the radial (thumb) side of the forearm, which is achieved by the contraction of muscles on the lateral (thumb) side of the forearm.
All of these movements of the radiocarpal joint are important for fine motor skills, such as writing, typing, and playing musical instruments, as well as for everyday activities such as lifting and carrying objects.
Correct Answer is B
Explanation
The rib is a part of the axial skeleton, not the appendicular skeleton.
The axial skeleton
Choice A is incorrect because the clavicle is a part of the pectoral girdle, which connects the upper limbs to the axial skeleton.
Choice C is incorrect because the femur is a part of the lower limb, which is supported by the pelvic girdle.
Choice D is incorrect because the scaphoid is a part of the carpals, which are bones of the wrist in the upper limb.
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