Spontaneous, automatic and mechanical responses are called ………..... .

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes spontaneous, automatic, and mechanical responses in the body.

2. **Identifying the Concept**: These types of responses are typically involuntary and occur without conscious thought. They are often quick reactions to stimuli.

3. **Defining the Term**: The term that describes these responses is "reflex action." Reflex actions are automatic responses to stimuli that do not require the involvement of the brain for processing.

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