What type of tissue lines the kidney tubules?
areolar CT
simple columnar ET
nonkeratinized stratified squamous ET
simple squamous ET
simple cuboidal ET
The Correct Answer is E
A. areolar CT: Areolar connective tissue provides support and flexibility beneath epithelial layers but does not line tubular structures like the kidney tubules.
B. simple columnar ET: Simple columnar epithelium is specialized for absorption and secretion in areas like the gastrointestinal tract. Its taller cells are not suited for the thin, absorptive lining required in kidney tubules.
C. nonkeratinized stratified squamous ET: This epithelium protects against abrasion in areas such as the esophagus and oral cavity, but its multiple layers and thickness make it inappropriate for kidney tubules where rapid exchange occurs.
D. simple squamous ET: Simple squamous epithelium allows rapid diffusion and is found in structures like the glomerulus, but it is too thin for the majority of the kidney tubules, which require more absorptive and secretory capacity.
E. simple cuboidal ET: Simple cuboidal epithelium forms the lining of most kidney tubules. Its cube-shaped cells provide the surface area necessary for absorption and secretion while maintaining a single-cell layer for efficient transport of substances.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. chondrocyte:Chondrocytes are specialized cells found in cartilage tissue. They produce and maintain the cartilaginous extracellular matrix and are not present in areolar connective tissue.
B. mast cell:Mast cells are abundant in areolar connective tissue and play a key role in inflammation by releasing histamine and other chemical mediators during immune responses.
C. macrophage:Macrophages are present in areolar connective tissue, where they function in phagocytosis to remove pathogens, debris, and damaged cells.
D. fibroblast:Fibroblasts are the most common cells in areolar connective tissue. They produce fibers such as collagen and elastin, as well as the extracellular matrix that provides structural support.
Correct Answer is D
Explanation
A. basal cell carcinoma:Basal cell carcinoma is the most common type of skin cancer, typically arising from the basal cells in the epidermis. It grows slowly and rarely metastasizes, making it less deadly than other skin cancers.
B. squamous cell carcinoma:Squamous cell carcinoma originates from the keratinocytes of the epidermis. It is more aggressive than basal cell carcinoma but still has a relatively good prognosis with early treatment.
C. skin lymphoma:Skin lymphoma is a rare cancer affecting lymphocytes in the skin. While it can be serious, it is not the most deadly form of skin cancer compared to melanoma.
D. melanoma:Melanoma arises from melanocytes and is the least common type of skin cancer. It is highly aggressive and prone to metastasis, making it the most deadly form if not detected and treated early.
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