A ciliated version of pseudostratified columnar epithelium containing mucus- secreting goblet cells
aids in digestion
is more durable than all other epithelia
is found in some of the larger glands
lines most of the upper respiratory tract
The Correct Answer is D
A. aids in digestion: Ciliated pseudostratified columnar epithelium is not involved in digestion. Digestive functions are primarily handled by simple columnar epithelium in the gastrointestinal tract.
B. is more durable than all other epithelia: While pseudostratified epithelium provides some protection, it is not the most durable epithelium. Stratified squamous epithelium is better suited to withstand abrasion and mechanical stress.
C. is found in some of the larger glands: Some simple columnar or cuboidal epithelia line glands, but ciliated pseudostratified columnar epithelium is not characteristic of glandular linings.
D. lines most of the upper respiratory tract: The ciliated pseudostratified columnar epithelium with goblet cells lines the nasal cavity, trachea, and bronchi. The cilia move mucus and trapped particles toward the throat, helping to clean and protect the respiratory system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. sebaceous:Sebaceous glands are exocrine glands that release sebum into hair follicles or onto the skin surface through ducts. They are not involved in direct secretion into the bloodstream.
B. exocrine:Exocrine glands secrete their products through ducts onto epithelial surfaces, such as sweat or salivary glands. They differ from endocrine glands, which release secretions directly into the blood.
C. endocrine:Endocrine glands, including the thyroid, pituitary, and adrenal glands, secrete hormones directly into the bloodstream. These hormones regulate numerous physiological processes throughout the body.
D. ceruminous:Ceruminous glands are specialized exocrine glands in the ear canal that secrete cerumen (earwax). They release their product via ducts, not into the blood.
Correct Answer is A
Explanation
A. within the cartilage divide and secrete new matrix:Chondroblasts are immature cartilage cells responsible for producing and secreting the extracellular matrix, including collagen and proteoglycans. They actively divide and contribute to cartilage growth, especially at the periphery (appositional growth).
B. remain in compact bone even after the epiphyseal plate closes:This description more closely matches osteocytes in bone, not chondroblasts. Chondroblasts are specific to cartilage and do not persist in compact bone after growth plates close.
C. are mature cartilage cells located in spaces called lacunae:This describes chondrocytes, the mature form of cartilage cells that reside in lacunae and maintain the matrix, rather than actively secreting it like chondroblasts.
D. never lose their ability to divide:Chondroblasts can divide while immature, but once they mature into chondrocytes, their division is very limited. Therefore, they do lose much of their proliferative capacity after maturation.
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