ATI RN
Integumentary System Questions Questions
Question 1 of 5
Which one of the following muscles are responsible for moving and shaking the skin-
Correct Answer: A
Rationale: The correct answer is A: Panniculus carnosus. This muscle is responsible for moving and shaking the skin, particularly in animals. It is a thin layer of muscle found in the subcutaneous tissue. It contracts to create goosebumps and aid in thermoregulation. The other choices, B: Collagen fibers, C: Sphincter muscles, and D: Arrector pili, do not directly move and shake the skin. Collagen fibers provide structural support, sphincter muscles control the opening and closing of passages, and arrector pili are responsible for hair erection, not skin movement.
Question 2 of 5
Scar tissue is the result of
Correct Answer: B
Rationale: The correct answer is B because scar tissue is primarily composed of collagen fibers, which are produced by fibroblasts during the wound healing process. Collagen fibers provide structural support and help in tissue repair. Scar tissue also has relatively few blood vessels compared to normal tissue. A: Increased numbers of fibroblasts alone do not directly result in scar tissue formation. C: The stratum germinativum is part of the epidermis and not directly involved in the formation of scar tissue. D: Scar tissue does not involve an increase in epidermal layers; it is mainly about the dermal layer with collagen deposition.
Question 3 of 5
The cuticle around a nail is the
Correct Answer: C
Rationale: The correct answer is C: Eponychium. The eponychium is the cuticle surrounding the nail, providing protection and sealing the nail bed. The free edge (Choice A) refers to the tip of the nail, not the cuticle. The lunula (Choice B) is the white, crescent-shaped area at the base of the nail and is not the cuticle. Epicondyle (Choice D) is a bony projection near a joint and is not related to the cuticle. Therefore, the eponychium is the correct answer as it specifically refers to the cuticle around the nail.
Question 4 of 5
The layer of the skin that contains bundles of collagen and elastic bers responsible for the strength of the skin is the ________ layer.
Correct Answer: B
Rationale: The correct answer is B: reticular. The reticular layer of the skin is located beneath the papillary layer and is composed of collagen and elastic fibers. These fibers provide strength and elasticity to the skin, helping to maintain its structure and integrity. The papillary layer is primarily responsible for nourishing the epidermis, while the epidermal layer is the outermost layer of the skin responsible for protection. The subcutaneous layer, also known as the hypodermis, is composed of fat and connective tissue, providing insulation and cushioning rather than strength. Therefore, the reticular layer is the most appropriate choice for the layer of the skin containing collagen and elastic fibers crucial for skin strength.
Question 5 of 5
What is the survival rate of a localized malignant melanoma that is detected and removed in the early stages of the cancer?
Correct Answer: A
Rationale: The correct answer is A: Above 95%. In localized malignant melanoma, early detection and removal significantly increase the survival rate. With timely intervention, the survival rate can exceed 95% due to the cancer being confined to the primary site and not having spread to other parts of the body. This is supported by medical research and statistical data on cancer outcomes. Choices B, C, and D are incorrect because they do not accurately reflect the high survival rate associated with early detection and treatment of localized malignant melanoma. Choice B (75%) is too low, while choices C (60%) and D (40%) are even further from the actual survival rates for early-stage melanoma.