Correct Answer: B

Rationale: The correct answer is B: Block beta stimulation in the heart. Propranolol is a beta-blocker that works by blocking beta-1 and beta-2 receptors in the heart. By doing so, it reduces the heart rate, decreases the force of contraction, and lowers blood pressure, which helps in managing angina. Option A is incorrect because propranolol does not act as a vasoconstrictor. Option C is incorrect because propranolol does not act as a vasodilator. Option D is incorrect because propranolol decreases the heart rate rather than increasing it.

Correct Answer: B

Rationale: The correct answer is B: Monitor for fatigue, muscle weakness, restlessness, and flushed skin. The patient is at risk for dehydration due to the combination of high temperature, age, and thiazide diuretic use. Thiazide diuretics can lead to electrolyte imbalances, including hypokalemia, which can cause symptoms such as muscle weakness and fatigue. Monitoring for signs of dehydration and electrolyte imbalances is crucial in this scenario to prevent complications. A: Making sure he drinks 8 glasses of water a day is not the priority as he is already at risk for dehydration and electrolyte imbalances. C: Hyperchloremia is not a common concern in this scenario based on the given lab values. D: Neurologic changes may occur in severe cases of electrolyte imbalances but monitoring for physical symptoms such as fatigue and muscle weakness is more relevant at this stage.

Correct Answer: B

Rationale: The correct answer is B: 45-year old woman who has never been pregnant. The risk of ovarian cancer increases with age and nulliparity (never having been pregnant) is a significant risk factor. The older a woman gets without having been pregnant, the higher her risk of developing ovarian cancer. The other choices do not have as high of a risk factor for ovarian cancer. Choice A, a 30-year old woman taking contraceptives, actually reduces the risk of ovarian cancer. Choice C, a 40-year old woman with three children, and choice D, a 36-year old woman who had her first child at age 22, both have lower risk factors compared to choice B.

Correct Answer: A

Rationale: The correct answer is A: Avoid alcohol and caffeine. Alcohol and caffeine are diuretics that can increase urine output, leading to fluid loss and potential hypovolemia. This step is crucial in preventing further dehydration. Summary of incorrect choices: B: Increasing milk and dairy products can contribute to fluid intake but does not address the prevention of hypovolemia. C: While dried peas and beans can provide nutrients, they do not specifically address fluid intake or prevention of hypovolemia. D: Avoiding table salt or sodium-containing foods may help in reducing fluid retention but does not directly address fluid intake to prevent hypovolemia.

Correct Answer: B

Rationale: The correct answer is B: IgE. IgE is specific to allergic responses as it binds to mast cells and basophils, triggering the release of histamine and other inflammatory mediators. IgA is more involved in mucosal immunity, IgG is involved in long-term immunity and opsonization, and IgM is the primary antibody in the primary immune response. IgB is not a known immunoglobulin. Therefore, IgE is the specific immunoglobulin associated with allergic responses due to its role in mediating hypersensitivity reactions.