NANP Board Practice Exam

What is the primary role of carnitine in the body?

1. Acts as a neurotransmitter

2. Assists in the transport of fatty acids across the mitochondrial membrane

3. Functions as an enzyme in protein synthesis

4. Regulates blood sugar levels

The correct answer is: Assists in the transport of fatty acids across the mitochondrial membrane

Carnitine's primary role in the body is to assist in the transport of fatty acids across the mitochondrial membrane. This function is crucial because fatty acids are a primary source of energy for the body, particularly during periods of fasting or prolonged exercise. By facilitating the movement of long-chain fatty acids into the mitochondria, carnitine ensures that these molecules can be oxidized (broken down) to produce ATP, the energy currency of the cell. The involvement of carnitine in fatty acid metabolism highlights its importance for energy production and overall metabolic function. The other options presented are related to different biochemical processes in the body, such as neurotransmission, enzyme activity, and glucose regulation, but they do not pertain to the specific function of carnitine in fat metabolism.