Different components of reflex arc are given below:
I. Effector organ
II. Interneuron ,
III. Motor neuron
IV. Sensory neuron
V. Sensory receptor
Choose the correct order an action potential follows after a sensory receptor is stimulated

Options

A. V, IV, III, II, I
B. V, IV, II, III, I
C. V, III, IV, I, II
D. V, II, IV, III, I

Answer

To determine the correct order in which an action potential follows after a sensory receptor is stimulated in a reflex arc, we need to understand the sequence of components involved in the reflex action. Here’s the step-by-step breakdown:

### Step-by-Step Solution:

1. **Sensory Receptor (V)**: The process begins when a sensory receptor is stimulated by an external stimulus (e.g., heat, light, pressure). This receptor converts the stimulus into an electrical signal (action potential).

2. **Sensory Neuron (IV)**: The action potential generated by the sensory receptor travels along the sensory neuron. This neuron carries the signal from the receptor to the central nervous system (CNS).

3. **Interneuron (II)**: Once the sensory neuron reaches the CNS, it synapses with an interneuron. The interneuron processes the information and relays the signal to the next neuron in the pathway.

4. **Motor Neuron (III)**: The interneuron transmits the signal to a motor neuron. The motor neuron carries the action potential away from the CNS to the effector organ.

5. **Effector Organ (I)**: Finally, the action potential reaches the effector organ (such as a muscle or gland), which responds to the stimulus by contracting or secreting, completing the reflex action.

### Correct Order:
The correct order of components in the reflex arc after a sensory receptor is stimulated is:
**V (Sensory Receptor) → IV (Sensory Neuron) → II (Interneuron) → III (Motor Neuron) → I (Effector Organ)**