Endochondral ossification
forms the parietal and frontal bones
results when the mesenchyme condenses into a fibrous CT around brain
occurs when bones develop from cartilage models
occurs when multiple centers of ossification converge together
The Correct Answer is C
A. forms the parietal and frontal bones
These bones are formed by intramembranous ossification, not endochondral. Intramembranous ossification occurs directly from mesenchyme.
B. results when the mesenchyme condenses into a fibrous CT around brain
This describes intramembranous ossification, not endochondral. Endochondral ossification uses a cartilage model, not fibrous connective tissue.
C. occurs when bones develop from cartilage models
Endochondral ossification is the process by which long bones and most bones of the body are formed by replacing a hyaline cartilage model with bone.
D. occurs when multiple centers of ossification converge together
While multiple ossification centers do form during endochondral ossification (e.g., primary in diaphysis, secondary in epiphyses), this does not define the process-it’s development from a cartilage model that is essential.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. difficulty absorbing nutrients from the intestine
This is related to gastrointestinal function, not brown fat. Brown fat is involved in thermoregulation, not nutrient absorption.
B. difficulty regulating his body temperature
Brown fat is specialized for non-shivering thermogenesis, particularly in newborns. Without it, the infant would struggle to generate body heat and maintain a stable temperature.
C. very stretchy tendons and skin
This suggests a connective tissue disorder like Ehlers-Danlos syndrome, not a defect in brown fat.
D. a reduced bone mass
Brown fat does not directly influence bone development or bone mass.
E. difficulty breathing
Respiratory function may be affected in other conditions, but brown fat deficiency does not directly impair breathing mechanics.
Correct Answer is D
Explanation
A. medullary cavity
This cavity holds marrow (red or yellow), not cartilage.
B. epiphyseal line
The epiphyseal line in adults is a remnant of the epiphyseal plate, but does not contain cartilage.
C. ends of the bones
Both Peter and Paul have articular hyaline cartilage at the ends of long bones for joint function.
D. epiphyseal plate
Only children like Peter have an epiphyseal plate (growth plate), which is made of hyaline cartilage. This area allows for bone lengthening during growth and becomes the epiphyseal line in adults like Paul.
E. in periosteum
The periosteum is a connective tissue membrane around bone-not cartilage.
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