Certified Dietary Manager (CDM) Practice Exam

What is the role of fiber in the diet?

1. To provide quick energy

2. To assist in digestion and promote bowel regularity

3. To build muscle mass

4. To enhance vitamin absorption

The correct answer is: To assist in digestion and promote bowel regularity

Fiber plays a crucial role in the diet primarily by assisting in digestion and promoting bowel regularity. It is a type of carbohydrate that the body cannot digest and helps to add bulk to the stool, facilitating its passage through the digestive tract. This is particularly important for maintaining regular bowel movements and preventing constipation. Additionally, fiber can help regulate the digestive system, lowering the risk of gastrointestinal issues. Moreover, fiber can aid in the management of weight and contribute to overall health by promoting a feeling of fullness, which can help control appetite. It also plays a role in regulating blood sugar levels and reducing cholesterol levels, which further supports cardiovascular health. The other options highlight functions that are not associated with fiber. Quick energy is primarily provided by carbohydrates and sugars that are easily digestible. Building muscle mass relies on protein intake, not fiber. While some types of fiber can help with the absorption of certain nutrients by slowing digestion, enhancing vitamin absorption is not the primary role of fiber in the diet. Thus, the emphasis on assisting digestion and promoting bowel regularity outlines its essential function effectively.