A nursing assistant must usually take the state test within ______ months after training.

Correct Answer: A

Rationale: The correct answer is A: 6 months. Nursing assistants typically must take the state test within 6 months after completing their training to become certified. This timeframe ensures that they have recently acquired the necessary knowledge and skills to pass the test. Choices B, C, and D are incorrect because waiting longer periods could result in the nursing assistant forgetting crucial information or skills, reducing their chances of passing the test. Additionally, delaying the test could hinder the assistant's ability to start working in the field promptly.

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: A

Rationale: The correct answer is A: Social development. School-age children's development includes forming relationships, understanding social norms, and developing communication skills. This is crucial for their emotional well-being and success in school. Pregnancy (B) is not relevant to school-age children. Learning to walk correctly (C) is typically achieved during infancy. Controlling bowels and bladders (D) is part of early childhood development, not specific to school-age children. Thus, A is the correct answer.

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.