1
Question
The contraction of which muscles bring both the mandibles close -
The contraction of which muscles bring both the mandibles close -
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Solution
The correct option is A Adductor
Mandibles are suspended from the sides of the head capsule, one on either side of the mouth. Each mandible having teeth-like cutting plates at its inner edge. The mandibles are jaws used for crushing and cutting the food.
The mandibles are movable by the contraction and relaxation of adductor and abductor set of muscles. The mandibles belong to fourth segment of the head.
So, the contraction of adductor muscle bring both the mandibles close.
Tergosternal are attached between tergal and sternal plates. Relaxation of tergosternal muscles helps in inspiration and contraction of tergosternal muscles helps in expiration.
Therefore, the correct answer is- adductor.
Mandibles are suspended from the sides of the head capsule, one on either side of the mouth. Each mandible having teeth-like cutting plates at its inner edge. The mandibles are jaws used for crushing and cutting the food.
The mandibles are movable by the contraction and relaxation of adductor and abductor set of muscles. The mandibles belong to fourth segment of the head.
So, the contraction of adductor muscle bring both the mandibles close.
Tergosternal are attached between tergal and sternal plates. Relaxation of tergosternal muscles helps in inspiration and contraction of tergosternal muscles helps in expiration.
Therefore, the correct answer is- adductor.
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