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If the receptor in a reflex arc is working but the motor nerve is damaged what is the most likely result?

Answer and explanation

Correct answer: Stimulus will be detected but command will not properly reach the effector

A reflex arc contains a receptor, sensory pathway, integration centre, motor pathway and effector. Because the receptor is functioning, the stimulus can still be detected and the sensory message can enter the pathway. However, damage to the motor nerve interrupts transmission from the control centre to the muscle or gland, so the response becomes weak or absent. Therefore A is correct; B ignores the working receptor and C and D are unrelated.

Related tags

Reflex-ArcMotor-NerveNervous-SystemControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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