The upper arm bone is known as the;
humerus
carpals
radius
ulna
The Correct Answer is A
Rationale:
A. The humerus is the long bone of the upper arm that extends from the shoulder to the elbow. It articulates proximally with the scapula at the glenoid cavity to form the shoulder joint and distally with the radius and ulna at the elbow joint. It serves as an important site for muscle attachment, allowing for a wide range of arm movements, and also houses the radial nerve and brachial artery along its course.
B. These are a group of eight small bones that form the wrist. They connect the forearm to the hand but are not located in the upper arm.
C. This is one of the two bones of the forearm, located on the lateral (thumb) side. It runs parallel to the ulna and articulates with the humerus at the elbow but is not part of the upper arm itself.
D. This is the second long bone of the forearm, located on the medial (pinky) side. It forms the hinge part of the elbow joint with the humerus, but like the radius, it is not an upper arm bone.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. Refers to paleness of the skin, often caused by decreased blood flow, anemia, or shock. It is not redness.
B. Refers to a yellow discoloration of the skin and eyes, typically caused by liver disease or bile duct obstruction.
C. Refers to a bluish tint of the skin due to low oxygen levels in the blood.
D. Erythema describes abnormal redness of the skin caused by increased blood flow to the capillaries in the dermis, which may occur with inflammation, infection, fever, sunburn, or allergic reactions.
Correct Answer is A
Explanation
Rationale:
A. Smooth muscle (found in organs and vessels) and cardiac muscle (in the heart) function involuntarily under the autonomic nervous system. Skeletal muscle, on the other hand, is under voluntary control through the somatic nervous system.
B. This would be incorrect because skeletal muscle is not involuntary, and smooth/cardiac muscles are not voluntary.
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