Assistant Laboratory Animal Technician (ALAT) Practice Exam

What is a primary difference between soluble and insoluble fiber?

1. Soluble fiber dissolves in water, while insoluble fiber does not.

2. Soluble fiber provides energy, while insoluble fiber does not.

3. Insoluble fiber is easier to digest than soluble fiber.

4. There is no difference; both serve the same function.

The correct answer is: Soluble fiber dissolves in water, while insoluble fiber does not.

The primary difference between soluble and insoluble fiber lies in their interaction with water. Soluble fiber has the ability to dissolve in water, forming a gel-like substance. This characteristic allows it to slow down digestion and absorption, which can help regulate blood sugar levels and lower cholesterol. Foods rich in soluble fiber include oats, beans, and some fruits like apples and citrus. In contrast, insoluble fiber does not dissolve in water, providing bulk to stool and aiding in its passage through the digestive tract. This type of fiber is crucial for promoting regularity and preventing constipation, and it can be found in whole grains, nuts, and vegetables. Understanding this fundamental difference is key for dietary planning, as incorporating both types of fiber is important for optimal digestive health.