Correct Answer: A

Rationale: The correct answer is A: Levodopa. Levodopa is the most effective pharmacologic agent for Parkinson's disease as it is converted to dopamine in the brain, replenishing dopamine levels which are depleted in Parkinson's. Selegiline and Symmetrel provide symptomatic relief but are not as effective as Levodopa. Permax is not commonly used due to its association with serious side effects like heart valve damage.

Correct Answer: A

Rationale: The correct answer is A: Hypocalcemia. Chvostek's sign and Trousseau's sign are both indicators of hypocalcemia, which is a common complication following thyroidectomy surgery due to potential damage to the parathyroid glands. Chvostek's sign is elicited by tapping the facial nerve and observing facial muscle twitching, while Trousseau's sign involves carpal spasm induced by inflating a blood pressure cuff above systolic pressure. Both signs are sensitive indicators of hypocalcemia due to their association with neuromuscular irritability. Hypercalcemia (option C) and hyperkalemia (option D) are not typically associated with thyroidectomy surgery and would not present with these specific signs. Hypokalemia (option B) is not related to Chvostek's sign and Trousseau's sign.

Correct Answer: C

Rationale: The correct answer is C: Fluid replacement. In end-stage AIDS with Cryptosporidium infection, the client experiences severe diarrhea leading to dehydration and electrolyte imbalances. Fluid replacement is crucial to prevent hypovolemia and maintain electrolyte balance. Adequate hydration supports renal function, prevents further complications, and aids in the elimination of the infectious agent. Pain management (A) may be needed for discomfort but is not the priority. Antiretroviral therapy (B) is essential for managing HIV but does not directly address the immediate issue of dehydration. High-calorie intake (D) is important for overall nutrition but does not address the urgent need for fluid replacement in this situation.

Correct Answer: D

Rationale: The correct answer is D (Downward) because it helps to maintain a clear airway for effective mouth-to-mouth respiration. By holding the victim's chin downward, you can ensure proper alignment of the airway, allowing the tongue to fall forward and prevent obstruction. Holding the chin forward (Choice A) may cause the airway to close, holding it backward (Choice B) may strain the neck, and holding it sideward (Choice C) may not provide optimal airway alignment. Holding the chin downward is the most effective and safe method for providing mouth-to-mouth respiration.

Correct Answer: D

Rationale: The correct answer is D: error in word choices. In left hemisphere stroke, language and speech centers are usually affected, leading to aphasia. This results in errors in word choices, difficulty expressing thoughts, and understanding language. Impulsivity and unsafe activities (choice A) are more commonly associated with frontal lobe damage. Motor deficits on the right eye (choice B) and left side of the body (choice C) are typical in strokes affecting the motor cortex, which is located in the contralateral hemisphere.