What might be a result of defective osteoclasts?
an inability to lay down new bone
an inability to lay down cartilage
an inability to regulate calcium
an inability to create matrix
The Correct Answer is C
A. an inability to lay down new bone
Bone formation is the role of osteoblasts, not osteoclasts.
B. an inability to lay down cartilage
Cartilage is formed by chondroblasts, unrelated to osteoclasts.
C. an inability to regulate calcium
Osteoclasts resorb bone, releasing calcium into the bloodstream. Defective osteoclasts impair this process, disrupting calcium homeostasis.
D. an inability to create matrix
Osteoclasts break down bone matrix, they don’t create it. Matrix creation is done by osteoblasts.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. neutrophils and macrophages are summoned to the area
This is an early step in the inflammatory phase to remove pathogens and debris.
B. blood fills the wound and a clot is formed
This occurs immediately after injury to stop bleeding and initiate repair.
C. granulation tissue is converted into connective tissue
This is part of the remodeling phase-the final stage-where the new tissue is matured and replaced with stronger connective tissue.
D. fibroblasts move in from surrounding connective tissue
This occurs during the proliferative phase, earlier than the final remodeling phase.
Correct Answer is E
Explanation
A. mesenchyme
Mesenchyme is a type of embryonic connective tissue from which all adult connective tissues develop. It has a fluid matrix and undifferentiated cells.
B. osteochondral
This is nota recognized fetal stem tissue type. It refers more to regions with both bone and cartilage precursors, but it's not a stem connective tissue.
C. mucous
Mucous connective tissue, found in the umbilical cord (Wharton's jelly), is another type of fetal stem connective tissue.
D. A & B
Mesenchyme is correct, but osteochondral is not a true fetal stem connective tissue.
E. A & C
Both mesenchyme and mucous connective tissue are fetal connective tissues with stem-like properties.
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