Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
A fracture in the shaft of a bone would be a break in the:
A. Metaphysis
The metaphysis is the region between the diaphysis and epiphysis, often containing the growth plate in children. It is not the shaft of the bone.
B. Epiphysis
The epiphysis refers to the ends of long bones, which articulate with adjacent bones. A fracture here would not be considered a shaft fracture.
C. Diaphysis
The diaphysis is the correct answer. It is the central shaft of a long bone, composed primarily of compact bone and housing the medullary cavity. Fractures in this region are common in long bones like the femur and humerus.
D. Periosteum
The periosteum is a fibrous membrane covering the outer surface of bones. While it may be affected in a fracture, it is not the structural region referred to as the shaft.
E. Endosteum
The endosteum lines the inner surface of the bone, including the medullary cavity. It plays a role in bone remodeling but is not the shaft itself
This question is an excerpt from Nurse Dive's nursing test bank - Anatomy and physiology proctored exam. Take the full exam now
Full Explanation
Choice A reason: The metaphysis is the region between the diaphysis and epiphysis, often containing the growth plate in children. It is not the shaft of the bone.
Choice B reason: The epiphysis refers to the ends of long bones, which articulate with adjacent bones. A fracture here would not be considered a shaft fracture.
Choice C reason: The diaphysis is the correct answer. It is the central shaft of a long bone, composed primarily of compact bone and housing the medullary cavity. Fractures in this region are common in long bones like the femur and humerus.
Choice D reason: The periosteum is a fibrous membrane covering the outer surface of bones. While it may be affected in a fracture, it is not the structural region referred to as the shaft.
Choice E reason: The endosteum lines the inner surface of the bone, including the medullary cavity. It plays a role in bone remodeling but is not the shaft itself
Similar Questions
Which of the following is NOT a function of the skeletal system?
A. Communication
Communication is not a direct function of the skeletal system. While the skeletal system supports structures involved in communication (e.g., the skull housing the brain), it does not itself facilitate communication.
B. Support
Support is a primary function of the skeletal system. It provides a rigid framework that supports the body and maintains its shape.
C. Storage of minerals
The skeletal system stores essential minerals such as calcium and phosphate, which can be released into the bloodstream as needed.
D. Production of blood cells
Hematopoiesis, or the production of blood cells, occurs in the red bone marrow found within certain bones. This is a vital function of the skeletal system.
E. Anchorage for muscles
Bones serve as anchoring points for muscles, allowing movement through the leverage of joints and tendons.
Full Explanation
Choice A reason: Communication is not a direct function of the skeletal system. While the skeletal system supports structures involved in communication (e.g., the skull housing the brain), it does not itself facilitate communication.
Choice B reason: Support is a primary function of the skeletal system. It provides a rigid framework that supports the body and maintains its shape.
Choice C reason: The skeletal system stores essential minerals such as calcium and phosphate, which can be released into the bloodstream as needed.
Choice D reason: Hematopoiesis, or the production of blood cells, occurs in the red bone marrow found within certain bones. This is a vital function of the skeletal system.
Choice E reason: Bones serve as anchoring points for muscles, allowing movement through the leverage of joints and tendons.
Yellow bone marrow contains a large percentage of:
A. Sharpey’s fibers
Sharpey’s fibers are collagen fibers that anchor the periosteum to the underlying bone. They are structural, not part of bone marrow.
B. Elastic tissue
Elastic tissue is found in ligaments and certain connective tissues but is not a major component of yellow bone marrow.
C. Spongy bone
Spongy bone surrounds the marrow cavities but is not the content of yellow marrow itself.
D. Fat
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.
E. Blood-forming cells
Blood-forming cells are found in red bone marrow, not yellow marrow. Red marrow is responsible for hematopoiesis.
Full Explanation
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.
_____ is attached to the Z disc.
A. Myosin
Myosin is the thick filament in muscle fibers and is not directly attached to the Z disc. It anchors in the center of the sarcomere at the M line and interacts with actin during contraction.
B. Actin
Actin is the correct answer. It forms the thin filaments in muscle fibers and is directly anchored to the Z disc. This attachment allows actin to slide past myosin during muscle contraction, shortening the sarcomere.
C. Troponin
Troponin is a regulatory protein complex that binds calcium and controls the position of tropomyosin on actin filaments. It is located along the actin filament but is not attached to the Z disc.
D. Myofibrils
Myofibrils are bundles of actin and myosin filaments organized into sarcomeres. While they span the length of the muscle fiber and include Z discs, they are not themselves attached to the Z disc.
E. Tropomyosin
Tropomyosin is a regulatory protein that lies along the actin filament and blocks myosin-binding sites in a relaxed muscle. It is not anchored to the Z disc.
Full Explanation
Choice A reason: Myosin is the thick filament in muscle fibers and is not directly attached to the Z disc. It anchors in the center of the sarcomere at the M line and interacts with actin during contraction.
Choice B reason: Actin is the correct answer. It forms the thin filaments in muscle fibers and is directly anchored to the Z disc. This attachment allows actin to slide past myosin during muscle contraction, shortening the sarcomere.
Choice C reason: Troponin is a regulatory protein complex that binds calcium and controls the position of tropomyosin on actin filaments. It is located along the actin filament but is not attached to the Z disc.
Choice D reason: Myofibrils are bundles of actin and myosin filaments organized into sarcomeres. While they span the length of the muscle fiber and include Z discs, they are not themselves attached to the Z disc.
Choice E reason: Tropomyosin is a regulatory protein that lies along the actin filament and blocks myosin-binding sites in a relaxed muscle. It is not anchored to the Z disc.