Final answer:
The concept is olfactory adaptation, where olfactory receptors become less responsive to a sustained stimulus. Additionally, diffusion plays a role in the movement of scent molecules. Perception combines physical scent sensations with emotional and memory responses.
Step-by-step explanation:
The concept illustrated by the initial strong odor becoming less noticeable over time is known as olfactory adaptation or sensory adaptation. This is where our sensory receptors, in this case olfactory receptors in our nose, become less responsive to a sustained stimulus, such as a constant odor. The phenomenon demonstrates how the scent receptors detect the smell when you first enter a room but then the perception of the smell diminishes as the receptors 'get used' to the smell and send fewer signals to the brain about it. This is part of our sensory system's way to filter out 'background noise' and be alert to new stimuli in our environment.
Another concept at play when walking into a room and being able to detect a specific smell is diffusion. This is the movement of particles from an area of high concentration to an area of lower concentration. For example, if your grandparents are cooking in the kitchen, the food's aroma particles diffuse through the air until they reach your nose.
When discussing the function and importance of smell, the role of perception cannot be overlooked. This psychological aspect combines the physical sensation of smell with our experiences, memories, and emotional responses. It is why a particular scent may evoke a specific memory or feeling, like recalling your grandmother's kitchen when smelling a certain spice.