Correct Answer: C

Rationale: The correct answer is C: To increase reabsorption of water in the renal tubules. Vasopressin, also known as antidiuretic hormone (ADH), works by increasing the reabsorption of water in the renal tubules, which helps to concentrate urine and reduce excessive urination in diabetes insipidus. Choice A is incorrect as vasopressin does not stimulate the pancreas to secrete insulin. Choice B is incorrect as vasopressin does not affect the absorption of glucose in the intestine. Choice D is incorrect as vasopressin's primary action is not to increase blood pressure, although it can have some vasoconstrictive effects.

Correct Answer: B

Rationale: The correct action when administering a bisacodyl suppository is to lubricate the index finger for easier insertion. Using a rectal applicator for insertion is not recommended for bisacodyl suppositories. Positioning the client supine with knees bent is not necessary for the administration of a bisacodyl suppository. While wearing gloves is important for infection control, sterile gloves are not required for this procedure.

Correct Answer: A

Rationale: Tachycardia is the correct answer as it is an adverse effect of levothyroxine. Levothyroxine is a medication used to treat hypothyroidism by supplementing the body with thyroid hormone. Tachycardia, or a fast heart rate, can indicate an overdosage or increased sensitivity to levothyroxine. Bradycardia, slow heart rate, weight loss, and increased appetite are not typically associated with adverse effects of levothyroxine. Bradycardia may actually be a symptom of untreated hypothyroidism.

Correct Answer: B

Rationale: The correct answer is B: Hypokalemia. Furosemide is a loop diuretic that can cause potassium depletion, leading to hypokalemia, which is a common adverse effect. Hypokalemia can result in serious complications like cardiac arrhythmias. Choices A, C, and D are not directly associated with the adverse effects of furosemide. Hypertension is a condition that furosemide is often used to treat, increased urine output is an expected effect of furosemide, and hyperglycemia is not a typical adverse effect of this medication.

Correct Answer: C

Rationale: The correct answer is C: aPTT. The healthcare provider should monitor the activated partial thromboplastin time (aPTT) value during heparin therapy to assess the client's coagulation status. Heparin affects the intrinsic pathway of the coagulation cascade, and monitoring aPTT helps ensure that the client is within the therapeutic range to prevent bleeding or clotting issues. INR (Choice A) is used to monitor warfarin therapy, not heparin. Serum creatinine (Choice B) is not directly related to monitoring heparin therapy. Bilirubin (Choice D) is related to liver function, not heparin therapy.