Question

Reflex actions are given by neuronal pathways called reflex arcs, which comprise different components. What should be the correct sequence of its components in withdrawal reflex after touching the hot things suddenly to withdraw the finger?

• A. Afferent neuron $ \rightarrow $ Efferent neuron $ \rightarrow $ Interneuron $ \rightarrow $ Receptor $ \rightarrow $ Effector
• B. Effector $ \rightarrow $ Afferent neuron $ \rightarrow $ Efferent neuron $ \rightarrow $ Interneuron $ \rightarrow $ Receptor
• C. Receptor $ \rightarrow $ Afferent neuron $ \rightarrow $ Efferent neuron $ \rightarrow $ Effector
• D. Receptor $ \rightarrow $ Afferent neuron $ \rightarrow $ Interneuron $ \rightarrow $ Efferent neuron $ \rightarrow $ Effector

Answer 1

Answer: (D)

Reflex arc comprises five components that are arranged in a sequence so that it receives sensory information such as extreme heat from a sense organ to CNS and gives a motor command to muscles or glands.
Receptor $ \rightarrow $ Afferent neuron $ \rightarrow $ Interneuron $ \rightarrow $ Efferent neuron $ \rightarrow $ Effector