The carrier is a person who carries a disease and

Correct Answer: C

Rationale: The correct answer is C because carriers can transmit the disease to others even if they are asymptomatic. Carriers can harbor the pathogen without showing symptoms but still spread it to others. Choice A is incorrect because carriers may not always show signs of the disease. Choice B is incorrect because carriers do not have control over the signs and symptoms of the disease. Choice D is incorrect because carriers can indeed transmit the specific disease to others.

Correct Answer: B

Rationale: The correct answer is B: Seam side down on the bed. This is because placing the seam side down ensures that the rough seam edges do not come in contact with the skin, providing a smoother and more comfortable surface to lie on. Placing the seam side up (choice A) would be uncomfortable. Tucking the seam into the mattress (choice C) may cause discomfort or create wrinkles. Turning the seam over at one end of the bed (choice D) may lead to unevenness and discomfort.

Correct Answer: D

Rationale: The correct answer is D: Orangewood sticks. Orangewood sticks are commonly used for nail care due to their durability, fine-grained texture, and ability to gently push back cuticles and clean under nails without causing damage. Rosewood (A), Greasewood (B), and Sandalwood (C) are not typically used for nail care purposes and do not offer the same benefits as Orangewood sticks.

Correct Answer: B

Rationale: Step-by-step rationale: 1. Carbohydrates are the body's primary source of energy. 2. They are broken down into glucose for immediate energy or stored as glycogen for later use. 3. Carbohydrates also provide fiber for digestive health. 4. Fats are primarily for energy storage, not immediate energy. 5. Proteins are essential for building and repairing tissues, not primarily for energy. 6. Vitamins are micronutrients that do not provide energy. In summary, carbohydrates are the correct answer as they are the main energy source and provide fiber, while fats, proteins, and vitamins have different primary functions.

Correct Answer: C

Rationale: The correct answer is C: Heartburn. When the sphincter muscle between the esophagus and stomach is weakened, it allows stomach acid to flow back into the esophagus, causing a burning sensation known as heartburn. This condition is specifically caused by the reflux of stomach acid into the esophagus, leading to discomfort and irritation. Choice A, Gastroesophageal discomfort, is a vague term that does not specifically describe the condition resulting from a weakened sphincter muscle. Choice B, Ulcers, typically result from bacterial infection or excessive use of nonsteroidal anti-inflammatory drugs, not directly from a weakened sphincter muscle. Choice D, Malabsorption, refers to the body's inability to absorb nutrients properly and is not directly related to a weakened sphincter muscle in the esophagus.