How does secretion of insulin vary according to the sugar level in blood?

Explanation

### Step-by-Step Solution:

1. **Understanding Blood Sugar Levels**: The first step is to recognize that blood sugar levels fluctuate throughout the day based on food intake and metabolic processes. When we consume carbohydrates, they are broken down into glucose, which enters the bloodstream.

2. **Role of the Pancreas**: The pancreas is a vital organ that monitors blood sugar levels. It contains clusters of cells known as islets of Langerhans, which are responsible for producing hormones, including insulin.

3. **Insulin Secretion in Response to High Sugar Levels**: When blood sugar levels rise (for example, after eating), the pancreas detects this increase. In response, it secretes insulin into the bloodstream. Insulin is crucial for helping cells absorb glucose, thereby lowering blood sugar levels.

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