Which of the following is an example of a prefix?

Correct Answer: D

Rationale: The correct answer is D: Tachy in tachycardia. A prefix is a word part added to the beginning of a base word to change its meaning. In this case, "tachy" is a prefix meaning fast or rapid. In tachycardia, it modifies the base word "cardia," referring to the heart, to indicate a rapid heart rate. Choices A, B, and C all contain word parts, but they are not prefixes. "Scope," "logy," and "ostomy" are all suffixes or root words, not added at the beginning of a base word to change its meaning.

Correct Answer: D

Rationale: The correct answer is D: Vaccine. A vaccine is administered to produce immunity to a specific disease by triggering the body's immune response to recognize and fight off the disease-causing agent, such as a virus or bacteria. Vaccines contain weakened or inactive forms of the pathogen to stimulate the immune system without causing the actual disease. A) Vesicle: A vesicle is a small fluid-filled sac and is not used to produce immunity to diseases. B) Vector: A vector is an organism that carries and transmits a pathogen, such as mosquitoes carrying malaria, but it is not administered to produce immunity. C) Vacuum: A vacuum is a space devoid of matter, and it is not related to immunity or disease prevention. In summary, the other choices are incorrect because they do not serve the specific purpose of producing immunity to a disease like a vaccine does.

Correct Answer: B

Rationale: The correct answer is B because measuring blood pressure on an arm with an IV can cause inaccurate readings and potential damage to the IV line. It is important to avoid placing any unnecessary pressure or restriction on the IV site to prevent complications such as infiltration or dislodgement. This guideline ensures the safety and well-being of the resident. Incorrect choices: A: Disconnecting the IV line when the bag is empty can interrupt the flow of medication or fluids, leading to potential harm to the resident. C: Getting the IV site wet during the resident's bath can increase the risk of infection or dislodgement of the IV line. D: Lowering the IV bag below the site for short intervals can cause improper flow rate and lead to complications like air embolism.

Correct Answer: B

Rationale: The correct answer is B: The side rail should be raised on the far side of the bed (side farther away from the NA). This is because raising the side rail on the far side of the bed ensures the resident's safety and prevents falls without obstructing the nursing assistant's access to the bed. Raising both side rails (A) may restrict the resident's movement and can be perceived as restrictive. Raising the side rail on the near side of the bed (C) may hinder the nursing assistant's ability to make the bed effectively. Lowering both side rails (D) is not appropriate as it compromises the resident's safety.

Correct Answer: C

Rationale: The correct answer is C: Oatmeal. Oatmeal is often used as an additive in special baths due to its soothing and moisturizing properties, making it beneficial for sensitive or irritated skin. Oatmeal contains anti-inflammatory compounds that can help alleviate skin conditions like eczema and dryness. It forms a protective barrier on the skin, locking in moisture and reducing itching. Sugar (A) is not typically used in baths as it can be abrasive on the skin. Corn meal (B) is also too harsh for the skin and may cause irritation. Alcohol (D) is drying and can strip the skin of its natural oils, making it unsuitable for special baths.