________ is a natural sugar that is used for energy.

Correct Answer: C

Rationale: The correct answer is C: Glucose. Glucose is a natural sugar that is a primary source of energy for the body's cells. It is produced during the process of photosynthesis in plants and is essential for various cellular functions. Sodium (A) is an electrolyte, not a sugar. Cholesterol (B) is a type of lipid, not a sugar. Gluten (D) is a protein found in wheat and other grains, not a sugar used for energy. Therefore, the correct choice is glucose as it aligns with the role of sugars in providing energy for the body.

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: Increased lung capacity. Deep-breathing exercises involve inhaling deeply, which helps to expand the lungs and improve their capacity. This allows for more efficient oxygen exchange and can improve overall respiratory function. Increased mucus in the respiratory system (A) is not a benefit of deep-breathing exercises and can actually be a sign of respiratory issues. Decreased salivary production (B) is unrelated to deep-breathing exercises. Decreased oxygen levels (D) would be counterproductive to the goal of deep-breathing exercises, which aim to improve oxygen intake.

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.