Core tissue histology including epithelium, connective tissue, and organ-specific microanatomy for USMLE Step 1.
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- What type of epithelium lines the alveoli for gas exchange?
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Simple squamous epithelium- What type of epithelium lines the kidney tubules?
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Simple cuboidal epithelium- What type of epithelium lines most of the small intestine?
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Simple columnar epithelium- What type of epithelium lines the trachea and most of the respiratory tract?
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Pseudostratified ciliated columnar epithelium- What type of epithelium lines the esophagus?
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Stratified squamous nonkeratinized epithelium- What type of epithelium makes up the epidermis?
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Stratified squamous keratinized epithelium- What type of epithelium lines the urinary bladder?
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Transitional epithelium (urothelium)- What is the main function of goblet cells?
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Secrete mucus- What is the function of microvilli on absorptive epithelial cells?
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Increase apical surface area for absorption- What is the function of tight junctions between epithelial cells?
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Seal the space between cells and block paracellular movement of substances- What is the function of desmosomes?
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Mechanically attach adjacent cells to resist shearing forces- What is the main structural protein of the basement membrane?
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Type IV collagen- What is the main function of fibroblasts?
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Produce and maintain extracellular matrix components, including collagen- Where is type I collagen mainly found?
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Bone, tendon, and skin- Where is type II collagen mainly found?
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Cartilage
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