Skin, lung, and blood vessel walls have which tissue characteristic in common?
elastic fibers
reticular fibers
simple squamous epithelium
simple columnar epithelium
The Correct Answer is A
A. elastic fibers: Elastic fibers are present in the skin, lungs, and blood vessel walls, providing resilience and the ability to stretch and recoil. In the skin, they maintain flexibility; in the lungs, they allow expansion and recoil during breathing; in blood vessels, they help accommodate pressure changes from blood flow.
B. reticular fibers: Reticular fibers form supportive networks in organs like the spleen, liver, and lymph nodes, but they are not a common feature of skin, lungs, or blood vessel walls.
C. simple squamous epithelium: Simple squamous epithelium is found lining blood vessels (endothelium) and alveoli in the lungs, but it is not present in the skin, so it is not a shared characteristic of all three tissues.
D. simple columnar epithelium: Simple columnar epithelium lines parts of the digestive tract and some glandular ducts but is absent from skin, lungs, and blood vessels, making it irrelevant as a shared feature.
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Related Questions
Correct Answer is A
Explanation
A. Pseudostratified columnar:Pseudostratified columnar epithelium appears multilayered due to nuclei positioned at different levels, but every cell contacts the basement membrane. This arrangement allows for functions such as secretion and movement of mucus, often aided by cilia in the respiratory tract.
B. Stratified cuboidal:Stratified cuboidal epithelium consists of two or more true layers of cuboidal cells, with only the basal layer in contact with the basement membrane. It provides protection and is typically found in ducts of glands.
C. Stratified columnar:Stratified columnar epithelium has multiple layers with only the deepest cells touching the basement membrane. It is rare and mainly found in parts of the pharynx, male urethra, and some glandular ducts.
D. Transitional:Transitional epithelium is specialized for stretching and recoiling, found in the urinary bladder. Cells change shape depending on tension, and not all layers contact the basement membrane.
Correct Answer is A
Explanation
A. mesothelium:Mesothelium is a specialized simple squamous epithelium that lines the serous membranes of body cavities, including the peritoneum, pleura, and pericardium. It provides a smooth, friction-reducing surface and facilitates the movement of organs within these cavities.
B. hyaline epithelium:Hyaline epithelium is not a recognized tissue type. Hyaline typically refers to cartilage, not epithelial tissue, and does not line serous membranes.
C. areolar CT:Areolar connective tissue is a loose connective tissue that supports and cushions organs, but it is not an epithelial layer and does not form the lining of serous membranes.
D. endothelium:Endothelium is a simple squamous epithelium that lines blood vessels and the heart, not serous cavities. It functions primarily in exchange of materials and maintaining vascular homeostasis.
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