The design of the body aims to facilitate quick responses to stimuli, such as heat, by incorporating reflex arcs. This minimizes the delay caused by involving the thinking process of the brain.

There could be a delay in responding to a hot object as signals travel from the brain to muscles through nerves, highlighting the role of nerves in transmitting instructions and the potential time lag in motor responses.

The brain receives signals through dense networks of intricately arranged neurons, and this connectivity is essential for processing information and responding to stimuli from different body parts.