What is the role of osteoclasts in bone remodeling?
Providing structural support
Producing red blood cells
Forming new bone
Breaking down bone tissue
The Correct Answer is D
A. Providing structural support: While bones provide structural support for the body, osteoclasts do not contribute to this directly. Their activity actually breaks down bone tissue, which is part of the remodeling process that ultimately maintains bone strength and integrity.
B. Producing red blood cells: Red blood cells are produced in the red bone marrow through hematopoiesis. Osteoclasts indirectly influence this by remodeling bone to maintain marrow cavities, but they do not produce blood cells themselves.
C. Forming new bone: Osteoblasts are responsible for forming new bone by synthesizing and mineralizing the bone matrix. Osteoclasts work in conjunction with osteoblasts, resorbing bone to allow space for new bone deposition and maintaining bone turnover balance.
D. Breaking down bone tissue: Osteoclasts are specialized cells that resorb bone, breaking down the mineralized matrix and releasing calcium and phosphate into the bloodstream. This process is essential for bone remodeling, repair, and maintaining mineral homeostasis in the body.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. To connect muscle to muscle: Connections between muscles are generally formed by aponeuroses or fascia, not tendons, and this is not their primary role in movement.
B. To connect muscle to bone: Tendons are strong, fibrous connective tissues that attach muscles to bones, allowing the force generated by muscle contraction to move the skeleton efficiently.
C. To store energy for muscle contraction: While elastic components in muscles and tendons can store some energy, the primary function of tendons is structural connection, not energy storage.
D. To protect the muscle during contraction: Tendons provide stability and transmit force, but they do not directly shield muscles from injury during contraction.
Correct Answer is D
Explanation
A. Ribs and sternum: The ribs and sternum form the thoracic cage, which protects vital organs like the heart and lungs, but they are not part of the pectoral girdle.
B. Femur and tibia: The femur and tibia are long bones in the lower limbs. They are part of the leg structure and have no role in connecting the upper limbs to the axial skeleton.
C. Ulna and radius: The ulna and radius are the two bones of the forearm. They form part of the upper limb distal to the pectoral girdle but do not constitute the girdle itself.
D. Clavicle and scapula: The clavicle (collarbone) and scapula (shoulder blade) form the pectoral girdle. They connect the upper limbs to the axial skeleton and provide attachment points for muscles that move the arms.
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.