New York Nail Technician License Practice Test

Which system is responsible for the body’s response to stimuli?

1. Endocrine system

2. Nervous system

3. Circulatory system

4. Digestive system

The correct answer is: Nervous system

The nervous system is fundamentally responsible for the body's response to stimuli. It operates through a complex network of neurons that transmit signals throughout the body. When a stimulus occurs—whether it be external (like touching a hot surface) or internal (such as sensing hunger)—the nervous system quickly receives the information and processes it. This rapid communication allows for immediate reactions, such as reflexes or more complex responses that require thought and coordination. In contrast, while the endocrine system also plays a role in the body's response, it functions through hormones that are released into the bloodstream, leading to slower responses compared to the immediate actions of the nervous system. The circulatory system primarily transports blood and nutrients essential for organ function, and the digestive system processes food for energy and nutrients, neither of which are directly responsible for responding to stimuli. Thus, it is the nervous system that is uniquely designed to handle sensory input and generate appropriate responses quickly.