What drug would the nurse administer to treat a patient diagnosed with bronchospasm associated with chronic obstructive pulmonary disease (COPD)?

Choice A rationale

Thiazide diuretics do not block the sodium pump. They act primarily on the distal convoluted tubule in the kidneys.

Choice B rationale

Thiazide diuretics block the chloride pump in the distal convoluted tubule, preventing the reabsorption of sodium and chloride, leading to increased urine output and decreased blood pressure.

Choice C rationale

Thiazide diuretics do not block the carbonic anhydrase pump. This action is associated with carbonic anhydrase inhibitors.

Choice D rationale

Thiazide diuretics do not block the potassium pump. They can cause potassium loss as a side effect, but this is not their primary mechanism of action.

Choice A rationale

Cardiac glycosides are not known for increasing heart rate. Instead, they tend to decrease heart rate by enhancing vagal tone and increasing the refractory period of the atrioventricular node, which helps in controlling heart rate, especially in atrial fibrillation.

Choice B rationale

Cardiac glycosides actually increase the force of myocardial contractions. They inhibit the sodium-potassium ATPase pump, which leads to an increase in intracellular sodium and calcium levels in the myocardial cells, thus increasing the force of contraction.

Choice C rationale

Cardiac glycosides do not significantly decrease conduction velocity. They primarily affect the contractility and heart rate but their influence on conduction velocity is relatively mild.

Choice D rationale

Cardiac glycosides improve renal blood flow and increase urine output by increasing the cardiac output and reducing the activation of the renin-angiotensin-aldosterone system. This helps in relieving symptoms of heart failure.