Yellow bone marrow contains a large percentage of:
Sharpey’s fibers
Elastic tissue
Spongy bone
Fat
Blood-forming cells
The Correct Answer is D
Choice A reason: Sharpey’s fibers are collagen fibers that anchor the periosteum to the underlying bone. They are structural, not part of bone marrow.
Choice B reason: Elastic tissue is found in ligaments and certain connective tissues but is not a major component of yellow bone marrow.
Choice C reason: Spongy bone surrounds the marrow cavities but is not the content of yellow marrow itself.
Choice D reason: Fat is the correct answer. Yellow bone marrow primarily consists of adipocytes and serves as an energy reserve. It replaces red marrow in many bones as a person ages.
Choice E reason: Blood-forming cells are found in red bone marrow, not yellow marrow. Red marrow is responsible for hematopoiesis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
Choice A reason: Smooth muscle does contract in response to electrical signals, but the mechanism is more complex and often involves calcium influx through voltage-gated channels rather than a classic action potential as seen in skeletal muscle.
Choice B reason: Cardiac muscle cells typically have one or two centrally located nuclei, not many. This distinguishes them from skeletal muscle cells, which are multinucleated.
Choice C reason: Cardiac muscle cells are found exclusively in the heart, not in large blood vessels. Large vessels contain smooth muscle in their walls, not cardiac muscle.
Choice D reason: Smooth muscle cells lack T tubules. T tubules are found in skeletal and cardiac muscle cells and are involved in rapid transmission of action potentials.
Choice E reason: Skeletal muscle cells are long, cylindrical, and multinucleated. This is a defining feature of skeletal muscle tissue and makes this statement true.
Correct Answer is C
Explanation
Choice A reason: Supraspinatus is one of the four rotator cuff muscles. It originates from the supraspinous fossa of the scapula and inserts on the greater tubercle of the humerus, aiding in shoulder abduction and stabilization.
Choice B reason: Infraspinatus is a rotator cuff muscle that originates from the infraspinous fossa of the scapula and inserts on the greater tubercle of the humerus. It functions in external rotation of the shoulder.
Choice C reason: Rhomboid minor is not part of the rotator cuff. It is located in the upper back and functions to retract the scapula. It does not attach to the humerus or contribute to shoulder joint stabilization.
Choice D reason: Teres minor is a rotator cuff muscle that originates from the lateral border of the scapula and inserts on the greater tubercle of the humerus. It assists in external rotation and stabilization of the shoulder.
Choice E reason: Subscapularis is the fourth rotator cuff muscle. It originates from the subscapular fossa and inserts on the lesser tubercle of the humerus, functioning in internal rotation of the shoulder.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.