Correct Answer: D

Rationale: The correct answer is D: Breast self-examination. This is because regular breast self-examination allows individuals to become familiar with their own breast tissue and identify any changes or abnormalities early on. X-ray (choice A) and surgical (choice C) are not typically used as early detection methods for breast cancer. Choice B is also incorrect because while mammograms (X-rays) are an important screening tool, self-examination should not be replaced by it, as it is a proactive way for individuals to take charge of their own health.

Correct Answer: B

Rationale: The correct answer is B: Obesity. Obesity is a known risk factor for colon cancer as excess body fat, especially around the waist, can lead to inflammation and insulin resistance, increasing the likelihood of cancerous cell growth in the colon. Smoking (choice A) is more strongly associated with lung and other types of cancer, not specifically colon cancer. Heavy alcohol consumption (choice C) is linked to other types of cancer, such as liver and esophageal cancer, but not as strongly to colon cancer. Saccharin consumption (choice D) has not been definitively linked to an increased risk of colon cancer.

Correct Answer: C

Rationale: The correct answer is C: Efferent neurons transmit impulses from the central nervous system to muscles and glands. This is because efferent neurons are responsible for carrying motor signals away from the central nervous system to control muscle movement and gland secretion. Afferent neurons (choice A) transmit sensory information from the body to the central nervous system. Affective (choice B) is not a term used in neuroscience for describing neuron functions. Effective (choice D) is not a term used in neuroscience and does not describe the specific function of transmitting impulses from the central nervous system to muscles and glands.

Correct Answer: A

Rationale: The correct answer is A: Where is the pain located? This question corresponds to the "P" in PQRST, which stands for Provocation/Palliation. By asking where the pain is located, the nurse is gathering information about what triggers or relieves the pain, aiding in the assessment of the chest pain. The other choices are incorrect because: B: What causes the pain? - This question corresponds to the "Q" in PQRST, which stands for Quality. It focuses on understanding the characteristics of the pain, not the cause. C: Does it come and go? - This question corresponds to the "R" in PQRST, which stands for Radiation. It pertains to whether the pain spreads to other areas, not if it comes and goes. D: What does the pain feel like? - This question corresponds to the "S" in PQRST, which stands for Severity. It relates to the intensity of the pain, not its location.

Correct Answer: C

Rationale: The correct answer is C: Normal saline solution. Phenytoin is incompatible with dextrose solutions, so options A and D are incorrect. Lactated Ringer's solution contains calcium, which can interact with phenytoin, leading to precipitation. Therefore, option B is also incorrect. Normal saline is the most compatible diluent for phenytoin, maintaining the drug's stability and effectiveness. It is essential to use the appropriate diluent to prevent adverse reactions or drug interactions.