Arteries, veins, and lymphatic vessels keep clots from sticking to the inside as long as their _______ is intact and healthy.
simple cuboidal epithelium
transitional epithelium
mesothelium
endothelium
The Correct Answer is D
A. simple cuboidal epithelium: Simple cuboidal epithelium is commonly found in glands and kidney tubules where secretion and absorption occur. It does not line blood vessels or play a role in preventing clot formation.
B. transitional epithelium: Transitional epithelium is specialized for stretching and is found in the urinary bladder and ureters. It is not present in blood or lymphatic vessels, so it does not influence clot prevention.
C. mesothelium: Mesothelium lines body cavities such as the pleura, peritoneum, and pericardium. Its function is to reduce friction between organs, not to maintain smooth blood flow within vessels.
D. endothelium: Endothelium is the thin layer of simple squamous epithelium lining blood and lymphatic vessels. A healthy endothelium provides a smooth, non-thrombogenic surface that prevents clots from adhering to the vessel wall.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer:Keratinocytes take up melanin granules produced by melanocytes and position them above the nucleus. This arrangement shields nuclear DNA from harmful UV radiation, reducing the risk of mutations and cellular damage.
B. provide the melanocyte with nutrients necessary for melanin synthesis:Nutrients for melanocyte function are delivered through blood supply in the dermis rather than directly by keratinocytes. Keratinocytes do not supply essential substrates for melanin production.
C. maintain the appropriate pH in order for the melanocyte to synthesize melanin granules:pH balance in the skin is regulated mainly by sweat and sebaceous secretions. Keratinocytes do not directly control melanocyte pH for melanin synthesis.
D. maintain the appropriate temperature so the product of the melanocyte will not denature:Temperature regulation is largely a function of dermal blood flow and sweat glands. Keratinocytes do not control melanocyte temperature or prevent denaturation of melanin.
Correct Answer is B
Explanation
A. cartilage CT:Cartilage connective tissue provides structural support in joints, the respiratory tract, and the ear, but it is not a component of spleen or lymph nodes, which require a softer supportive framework.
B. reticular CT:Reticular connective tissue forms a delicate, branching network of fibers that supports lymphocytes and other immune cells in organs like the spleen and lymph nodes. This framework helps filter body fluids and supports immune function.
C. adipose CT:Adipose connective tissue stores energy and provides insulation and cushioning. While it may surround organs, it does not form the internal supportive framework of lymphatic organs.
D. smooth MT:Smooth muscle tissue is found in the walls of hollow organs, blood vessels, and the digestive tract. It plays a role in involuntary movement, not in forming the supportive structure of lymphoid organs.
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