A tissue has the following characteristics: some EC matrix, abundant collagen fibers oriented parallel to each other. Which of the following injuries results in damage to mainly this type of tissue?
broken femur bone
bullet penetrating the abdominal wall
tear in the cartilage of the knee
tear in the calcaneal tendon
The Correct Answer is D
A. broken femur bone
Bone tissue has a dense matrix with calcium salts and collagen fibers, but the collagen is not typically arranged in long, parallel bundles as in tendons.
B. bullet penetrating the abdominal wall
This would damage multiple tissues, including muscle, skin, and possibly organs, but it is not specific to dense regular connective tissue with parallel collagen fibers.
C. tear in the cartilage of the knee
Cartilage (e.g., fibrocartilage in the knee) has collagen, but the fibers are not organized in parallel; it's not the classic example of this connective tissue type.
D. tear in the calcaneal tendon
Tendons are made of dense regular connective tissue, which has parallel collagen fibers providing tensile strength. A tear here directly damages this specific tissue type.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. collagen
Collagen provides tensile strength and structural support in connective tissues but is not water-resistant or as hard as keratin.
B. elastic
Elastic fibers allow tissues to stretch and recoil. They are not hard or water-resistant.
C. hyaluronic acid fibrin
Hyaluronic acid is a glycosaminoglycan important for hydration in connective tissue; fibrin is a clotting protein. Neither is a hard, water-resistant structural protein.
D. keratin
Keratin is a fibrous protein found in skin, hair, and nails. It provides a tough, water-resistant barrier on the outer skin (especially in the stratum corneum).
Correct Answer is A
Explanation
A. mucus: Mucous membranes line body cavities that open to the exterior, such as the respiratory, digestive, and urogenital tracts. They contain goblet cells that secrete mucus.
B. synovial: Synovial membranes line joint cavities and produce synovial fluid, not found in the respiratory tract.
C. serous: Serous membranes line body cavities that do not open to the exterior (e.g., pleura, pericardium, peritoneum) and secrete a watery fluid, not mucus.
D. peritoneal: The peritoneal membrane is a type of serous membrane lining the abdominal cavity, not the respiratory tract.
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