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.

Correct Answer: A

Rationale: The correct answer is A: cell culture. In the management of severe burns, cell culture is not typically used. Fluid replacement is crucial for maintaining circulation and preventing shock. Corticosteroids may help reduce inflammation. Antibiotics are used to prevent or treat infections. Cell culture is not directly involved in the immediate management of severe burns and is more relevant in research or specialized cases.

Correct Answer: A

Rationale: The correct answer is A because perspiration produced by merocrine sweat glands does not directly produce body odor. Body odor is primarily caused by the interaction between sweat and bacteria on the skin. Merocrine sweat glands produce watery sweat that contains electrolytes and waste products. This watery sweat helps regulate body temperature and prevents bacteria from colonizing the skin due to its slightly acidic nature. Therefore, choice A is incorrect as merocrine sweat glands do not directly produce body odor.

Correct Answer: C

Rationale: The correct answer is C: mammary glands. These glands are specifically designed to produce milk in mammals for feeding their young. Sebaceous glands (A) produce oil for the skin, ceruminous glands (B) produce earwax, and eccrine sweat glands (D) produce sweat for thermoregulation. Only mammary glands are responsible for milk production, making choice C the correct answer.

Correct Answer: D

Rationale: The correct answer is D: sweat glands. Sweat glands help regulate body temperature and water content by secreting sweat, which evaporates and cools the body. Sebaceous glands (A) secrete oil for lubrication, Dysplastic Nevi (B) are atypical moles, and a puncture wound (C) is unrelated to regulating body temperature and water content.