Diuretics increase urine secretion, primarily to rid the body of excess water and salt.
True
False
The correct answer and explanation is:
Correct Answer: True
Explanation:
Diuretics are a class of medications or substances that promote the increased production and excretion of urine. They act primarily on the kidneys to help the body eliminate excess water (fluid) and sodium (salt). Because of this function, diuretics are often referred to as “water pills.”
How Diuretics Work:
The kidneys play a central role in filtering blood, removing waste, and regulating fluid and electrolyte balance. Diuretics interfere with this process in various parts of the nephron (the kidney’s filtering unit), leading to reduced reabsorption of sodium. Since water follows sodium, this results in increased water loss through urine.
There are three main types of diuretics:
- Thiazide diuretics – act on the distal convoluted tubule (e.g., hydrochlorothiazide).
- Loop diuretics – act on the loop of Henle (e.g., furosemide).
- Potassium-sparing diuretics – act on the distal tubule but conserve potassium (e.g., spironolactone).
Medical Uses:
Diuretics are commonly prescribed for:
- Hypertension (high blood pressure): By reducing fluid volume, they decrease blood pressure.
- Heart failure: Helps prevent fluid buildup in lungs and extremities.
- Edema: Reduces swelling caused by fluid retention.
- Kidney disorders: Assists in managing fluid balance.
Conclusion:
The statement is true. Diuretics indeed increase urine secretion and are primarily used to rid the body of excess water and salt. Their action on the kidneys makes them vital tools in managing conditions involving fluid overload or electrolyte imbalances. However, prolonged or improper use can lead to dehydration or electrolyte disturbances, so they must be used under medical supervision.