Give the sequence involved in a reflex action

Explanation

### Step-by-Step Solution for the Sequence Involved in a Reflex Action:

1. **Stimulus**: The process begins with a stimulus, which is an external factor that triggers a reflex action. For example, touching a hot object.

2. **Receptor Organ**: The stimulus is detected by a receptor organ (such as skin), which senses the change in the environment (like heat from the hot object).

3. **Afferent Nerve**: Once the receptor detects the stimulus, it sends an electrical impulse through an afferent (sensory) nerve towards the central nervous system (CNS).

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