Question

The muscles help in the movement of the mandibles of Periplaneta

• A. Adductor and abductor muscles
• B. Dorso - ventral muscles
• C. Alary muscles
• D. Dorso - longitudinal muscles

Hint:

The adductor muscles close the mandibles while the abductor muscles open them. Understanding the role of these muscles helps in grasping how insects manipulate objects.

Answer 1

The Correct Option is A

The movement of the mandibles in Periplaneta (cockroach) is facilitated by the adductor and abductor muscles. These muscles work by contracting and relaxing to move the mandibles, which are used for food manipulation and defense.

• Adductor muscles: These pull the mandibles towards the midline, closing them.
• Abductor muscles: These pull the mandibles away from the midline, opening them.

Hence, the correct muscles that help in the movement of mandibles are the adductor and abductor muscles.

Thus, the correct option is Option (1).