Final answer:
A squat exercise primarily targets the quadriceps, hamstrings, and gluteal muscles.
Step-by-step explanation:
Yes, it is true that a squat exercise primarily targets the quadriceps, hamstrings, and gluteal muscles. The quadriceps femoris, which is located in the anterior compartment of the thigh, is responsible for extending the knee. On the other hand, the hamstrings, which are found in the posterior compartment of the thigh, flex the knee. The gluteal muscles, specifically the gluteus maximus, play a role in extending the thigh.