Which of the following is a function of the immune system?

Correct Answer: C

Rationale: The correct answer is C: Protects against the invasion of foreign substances and pathogens. The immune system functions to identify and eliminate harmful foreign substances like bacteria, viruses, and other pathogens to protect the body from infections and diseases. It does so through a complex network of cells, tissues, and organs that work together to recognize and neutralize these threats. Choices A, B, and D are incorrect because maintaining blood sugar levels is primarily regulated by the endocrine system, hormone production is regulated by the endocrine system, and body temperature regulation is controlled by the thermoregulatory system, respectively.

Correct Answer: A

Rationale: The correct answer is A: 6 months. This is because most states require nursing assistants to take the state test within 6 months after completing their training to ensure they have recent knowledge and skills. Choice B, 12 months, is too long of a gap for testing after training. Choice C, 24 months, and choice D, 36 months, are even longer durations, which would not be beneficial for assessing the competency of nursing assistants in a timely manner. Therefore, choice A is the most appropriate timeframe for taking the state test after training.

Correct Answer: C

Rationale: Step 1: A living will is a legal document that outlines an individual's preferences for medical treatment in case they become incapacitated. Step 2: Choice C aligns with the definition of a living will as it mentions stating medical care preferences. Step 3: Choices A, B, and D are incorrect as they do not relate to the purpose of a living will. Step 4: Choice A talks about estate distribution after death, not medical care decisions. Step 5: Choice B mentions inheritance wishes, which are typically covered in a will, not a living will. Step 6: Choice D discusses financial affairs management, which is addressed in a power of attorney, not a living will. Step 7: Therefore, Choice C is the correct answer as it accurately describes the purpose of a living will in managing medical care preferences.

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: A

Rationale: The correct answer is A: Social development. School-age children undergo significant social development as they interact with peers, develop friendships, and learn to navigate social situations. This is a crucial aspect of their overall growth and impacts their emotional well-being. Choices B, C, and D are incorrect as they do not specifically relate to school-age children's development. Pregnancy (choice B) is not relevant to children, learning to walk correctly (choice C) is more relevant to infants or toddlers, and controlling bowels and bladders (choice D) is typically mastered during the earlier stages of development.