Which type of membrane would be lining the respiratory tract?
mucus
synovial
serous
peritoneal
The Correct Answer is A
A. mucus: Mucous membranes line body cavities that open to the exterior, such as the respiratory, digestive, and urogenital tracts. They contain goblet cells that secrete mucus.
B. synovial: Synovial membranes line joint cavities and produce synovial fluid, not found in the respiratory tract.
C. serous: Serous membranes line body cavities that do not open to the exterior (e.g., pleura, pericardium, peritoneum) and secrete a watery fluid, not mucus.
D. peritoneal: The peritoneal membrane is a type of serous membrane lining the abdominal cavity, not the respiratory tract.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
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.
Correct Answer is A
Explanation
A. hyaluronic acid + proteoglycan monomers: Hyaluronic acid forms the central stalk (handle of the "toilet brush"), and proteoglycan monomers attach along its length, forming a large aggregate that traps water and gives ground substance its gel-like consistency.
B. reticular fibers + collagen fibers: These are structural protein fibers in connective tissue but are not components of proteoglycan aggregates.
C. chondroblasts and chondroclasts: These are cartilage cells involved in formation (chondroblasts) and resorption (chondroclasts) but not part of the ground substance's molecular structure.
D. collagen fibers + fibroblasts: Collagen fibers are structural; fibroblasts produce extracellular matrix components, but neither directly forms the proteoglycan aggregate.
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