The embryonic skeleton is made up of which kind of tissue?
fibrocartilage CT
hyaline cartilage CT
elastic CT
dense regular CT
elastic cartilage CT
The Correct Answer is B
A. fibrocartilage CT: Fibrocartilage is found in intervertebral discs and some joint areas, providing strong support and shock absorption, but it does not form the embryonic skeleton.
B. hyaline cartilage CT: The embryonic skeleton is primarily composed of hyaline cartilage, which provides a flexible template that allows growth and later ossification into bone during development.
C. elastic CT: Elastic connective tissue contains many elastic fibers, giving flexibility to structures like the lungs and large arteries, but it does not form the framework of the embryonic skeleton.
D. dense regular CT: Dense regular connective tissue forms tendons and ligaments with parallel collagen fibers, providing tensile strength, but it does not contribute to the embryonic skeletal framework.
E. elastic cartilage CT: Elastic cartilage is found in structures requiring flexible support, such as the ear and epiglottis, and is not the primary tissue of the embryonic skeleton.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. less chance for infection:While following cleavage lines can improve wound closure, the risk of infection depends more on sterile technique and postoperative care. Cutting along cleavage lines does not directly lower infection risk.
B. greater chance of infection:Cutting parallel to cleavage lines does not increase infection risk. Infection is influenced by factors such as contamination, immune status, and surgical environment rather than incision alignment.
C. slowed healing and greater scarring:Incisions made across cleavage lines place tension on wound edges, which can slow healing and result in more prominent scars. Cutting along cleavage lines avoids this complication.
D. faster healing of the skin and less scarring:Cleavage lines (Langer’s lines) represent the natural orientation of collagen fibers in the dermis. Surgical incisions made parallel to these lines heal more quickly and with minimal scarring because they experience less tension.
Correct Answer is C
Explanation
A. Nonkeratinized stratified squamous:This epithelium type is found in areas subject to friction and abrasion, such as the esophagus and oral cavity. Its multiple layers make it unsuitable for efficient gas exchange, as diffusion is slowed by the thickness of the tissue.
B. Simple columnar:Simple columnar epithelium is specialized for absorption and secretion, commonly found in the gastrointestinal tract. Its tall cell structure is not ideal for rapid diffusion, making it poorly suited for alveolar gas exchange.
C. Simple squamous:Simple squamous epithelium consists of a single, thin layer of flat cells. Its delicate structure provides a minimal barrier for diffusion, allowing oxygen and carbon dioxide to rapidly pass through the alveolar walls during respiration.
D. Simple cuboidal:Simple cuboidal epithelium is found in glands and kidney tubules where secretion and absorption occur. Its cube-shaped cells are thicker than squamous cells, creating a greater distance for gases to diffuse, which reduces efficiency in the lungs.
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