A _______________ burn affects the epidermis,dermis and underlying tissue.

Correct Answer: D

Rationale: The correct answer is D: Third-degree burn. A third-degree burn affects the epidermis, dermis, and underlying tissue, resulting in damage to all layers of the skin. This type of burn is the most severe, causing significant tissue destruction and requiring medical attention. A: Second-degree burn only affects the epidermis and dermis, not the underlying tissue. B: First-degree burn only affects the outer layer of the skin (epidermis). C: Partial-thickness burn is a general term that can refer to both first- and second-degree burns, but it does not specifically indicate damage to the underlying tissue like a third-degree burn does.

Correct Answer: C

Rationale: The correct answer is C: Stores calcium and phosphorus. The musculoskeletal system plays a crucial role in storing minerals like calcium and phosphorus, which are essential for bone health and muscle function. Bones act as a reservoir for these minerals, releasing them when needed for various bodily functions. This function helps maintain the body's mineral balance and supports overall skeletal strength. Explanation for why the other choices are incorrect: A: Storing vitamin D is primarily done by adipose tissue and the liver, not the musculoskeletal system. B: Supplying oxygen to cells is the role of the respiratory and circulatory systems, not the musculoskeletal system. D: Transporting antibodies to cells is the function of the immune system, involving the lymphatic system and blood circulation, not the musculoskeletal system.

Correct Answer: C

Rationale: The correct answer is C: Burn fat. In cases of hyperglycemia from diabetes, the body may turn to burning fat for energy through a process called lipolysis. This is because the excess glucose in the bloodstream cannot be properly utilized by cells due to insulin insensitivity. Burning fat generates ketone bodies, which can be used as an alternative energy source. Burning sugar (A) is not efficient in hyperglycemic conditions. Burning proteins (B) is not preferred as it can lead to muscle breakdown. Burning minerals (D) is not a direct energy source for the body. Therefore, burning fat is the most suitable method for the body to find materials for energy in cases of hyperglycemia.

Correct Answer: B

Rationale: The correct answer is B: Dorsiflexion. Bending backward is the movement of bringing the top of the foot towards the shin, which is dorsiflexion at the ankle joint. Rotation (A) refers to turning around an axis, not bending backward. Supination (C) is the upward rotation of the forearm, not bending backward. Opposition (D) is the movement of the thumb towards the fingers, not bending backward. Therefore, the correct term for bending backward is dorsiflexion.

Correct Answer: B

Rationale: The correct answer is B (4 hours) because repositioning a resident on a mechanical ventilator is crucial to prevent pressure ulcers and maintain proper ventilation. Repositioning every 4 hours helps distribute pressure, improve circulation, and prevent skin breakdown. Choice A (5 hours) is too long, increasing the risk of complications. Choice C (3 hours) may be too frequent and could disrupt the patient's rest. Choice D (2 hours) is too frequent and may not allow enough time for the patient to rest and heal. Therefore, B is the most appropriate interval for repositioning a resident on a mechanical ventilator.