Deficiency of a hormone cause increase `K^(+)` ions in decrease `Na^(+)` ion in blood. It is caused by

Options

A. Zona fasciculata
B. Zona glomerata
C. Zona reticulata
D. Zona pellucida.

Answer

To solve the question regarding the deficiency of a hormone that causes an increase in potassium ions (K⁺) and a decrease in sodium ions (Na⁺) in the blood, we can follow these steps:

### Step 1: Identify the Hormone
The hormone responsible for regulating sodium and potassium levels in the blood is **aldosterone**. Aldosterone is produced in the **zona glomerulosa** of the adrenal cortex.

**Hint:** Think about which hormone regulates electrolyte balance, particularly sodium and potassium.

### Step 2: Understand the Function of Aldosterone
Aldosterone promotes the reabsorption of sodium ions (Na⁺) from the renal tubules back into the bloodstream and facilitates the excretion of potassium ions (K⁺) into the urine. This means that when aldosterone levels are normal, sodium levels in the blood increase, and potassium levels decrease.

**Hint:** Recall the roles of hormones in maintaining electrolyte balance, especially aldosterone's specific actions.

### Step 3: Analyze the Effects of Aldosterone Deficiency
If there is a deficiency of aldosterone, the opposite effects occur. Sodium reabsorption is reduced, leading to lower sodium levels in the blood. Concurrently, potassium excretion is reduced, resulting in higher potassium levels in the blood.

**Hint:** Consider what happens when a hormone that regulates a specific process is deficient.

### Step 4: Identify the Correct Answer
Given that the question asks for the cause of increased potassium and decreased sodium in the blood due to hormone deficiency, the correct answer is **zona glomerulosa**, as it is the layer of the adrenal cortex that produces aldosterone.

**Hint:** Look for the adrenal cortex layers and their respective hormone functions to find the correct answer.

### Final Answer
The deficiency of the hormone aldosterone, produced by the **zona glomerulosa**, causes an increase in potassium ions (K⁺) and a decrease in sodium ions (Na⁺) in the blood.