Name the chemical, deficiency of which causes Parkinson's disease while excess produces schizophrenia

Options

A. Dopamine
B. Acetylcholine
C. Endorphins
D. Glycine.

Answer

To answer the question, we need to identify the chemical that is linked to both Parkinson's disease and schizophrenia. Here’s the step-by-step solution:

### Step 1: Identify the Chemicals
The options provided are:
- Dopamine
- Acetylcholine
- Endorphins
- Glycine

### Step 2: Understand the Role of Dopamine
Dopamine is a neurotransmitter that plays a significant role in the brain's reward system and motor control. It is produced in several areas of the brain and is crucial for regulating mood and movement.

### Step 3: Link Dopamine Deficiency to Parkinson's Disease
A deficiency of dopamine is known to cause Parkinson's disease. In this condition, the neurons that produce dopamine degenerate, leading to symptoms such as muscle rigidity, tremors, and difficulty with movement.

### Step 4: Link Dopamine Excess to Schizophrenia
On the other hand, an excess of dopamine is associated with schizophrenia. This mental health disorder can impair a person's ability to think clearly, concentrate, and remember information. Symptoms may include hallucinations and delusions.

### Step 5: Conclusion
Based on the information gathered, the chemical that causes Parkinson's disease when deficient and schizophrenia when in excess is **dopamine**.

### Final Answer
The chemical is **dopamine**.

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