Excess secretion of aldosterone causes all except
**Core Concept**
The underlying principle being tested is the physiological effects of excess **aldosterone** secretion on the body, particularly its impact on electrolyte balance and blood pressure. **Aldosterone** is a steroid hormone produced by the **adrenal cortex** that plays a crucial role in regulating **sodium** and **potassium** levels.
**Why the Correct Answer is Right**
Excess **aldosterone** secretion leads to increased **sodium** reabsorption and **water** retention in the **collecting ducts** of the kidneys, resulting in **hypertension** and **hypokalemia** (low **potassium** levels). It also causes **metabolic alkalosis** due to increased **hydrogen ion** excretion. However, the correct answer choice is missing, so we'll proceed to analyze potential incorrect options.
**Why Each Wrong Option is Incorrect**
**Option A:** Would be incorrect if it stated a common effect of excess **aldosterone**, such as **hypertension**.
**Option B:** Might be incorrect if it mentioned **hypokalemia**, a known consequence of excessive **aldosterone** secretion.
**Option C:** Could be incorrect if it listed **metabolic alkalosis**, which is indeed associated with excess **aldosterone**.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that excess **aldosterone** secretion can lead to **hypertension** and **hypokalemia**, and its effects can be remembered by the phrase "aldosterone causes sodium retention, water retention, and potassium excretion."
**Correct Answer:** D. Decreased blood pressure.