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 group of letters attached to the beginning of a word to change its meaning. In this case, "tachy-" means fast or rapid. In tachycardia, "tachy-" is added to "cardia" to indicate a fast heart rate. Choices A, B, and C all contain word parts, but they are not prefixes. "Scope," "logy," and "ostomy" are all word roots or suffixes, as they do not change the meaning of the word when attached to other words.

Correct Answer: D

Rationale: The correct answer is D: Vaccine. A vaccine is specifically designed to produce immunity to a particular disease by stimulating the body's immune system to recognize and respond to the disease-causing agent. Vaccines contain weakened or inactivated forms of the pathogen, allowing the immune system to develop memory cells for future protection. Rationale: A: Vesicle is a small blister-like structure and is not used to produce immunity. B: Vector is an organism that transmits a pathogen but is not directly involved in producing immunity. C: Vacuum is a space entirely devoid of matter and is not related to immunity or disease prevention.

Correct Answer: B

Rationale: The correct answer is B: The NA should not measure blood pressure on an arm with an IV. This is because measuring blood pressure on an arm with an IV can disrupt the IV line, leading to potential complications such as infiltration or dislodgment. It is important to avoid applying pressure or constricting the area around the IV site to ensure proper flow of fluids and medication. Explanation of other choices: A: The NA should not disconnect the IV line when the bag is empty as this can lead to air entering the line, causing air embolism. C: The NA should avoid getting the IV site wet during the resident's bath to prevent infection or dislodgment of the IV catheter. D: Lowering the IV bag below the site for short intervals is not recommended as it can cause an uneven flow rate and compromise the effectiveness of IV therapy.

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 it ensures the resident's safety and prevents falls while allowing the nursing assistant easy access to make the bed without obstructing the resident. Raising both side rails (choice A) unnecessarily restricts the resident's movement. Raising the near side rail (choice C) may hinder the nursing assistant's ability to efficiently make the bed. Lowering both side rails (choice D) compromises the resident's safety.

Correct Answer: C

Rationale: The correct answer is C: Oatmeal. Oatmeal is a common additive used in special baths due to its soothing and moisturizing properties. It can help alleviate skin conditions such as eczema and dry skin. Sugar (A) can be abrasive on the skin, corn meal (B) may be too harsh, and alcohol (D) can be drying and irritating, making them unsuitable for special baths. Oatmeal is the best choice for its gentle, calming effects on the skin.