Directions: Use the information provided and your knowledge of Life Science to answer the following questions. Show all work where necessary.
Directions: Use the information provided and your knowledge of Life Science to answer the following questions. Show all work where necessary.
The sense of smell, or olfaction, begins when sensory receptors inside the nasal cavity detect molecules in the air. These receptors send electrical signals through the olfactory nerve to the olfactory bulb, a structure located at the front of the brain.
What makes smell unique is that its neural pathway bypasses the thalamus - the brain’s usual “relay center.” Instead, it connects directly to two important parts of the limbic system:
The amygdala, which processes emotion, and
The hippocampus, which forms and stores memories.
This direct connection explains why smells often trigger strong emotional memories. For example, the smell of sunscreen might remind someone of the beach, or pine might bring back a memory of winter holidays.
When a scent is detected, the brain may respond immediately with emotion (“I love that smell!”) or store the information as part of a memory. This shows that sensory receptors not only cause instant reactions but also support long-term memory formation, connecting sensory biology with behavior and emotion.
Graph of Information - Figure 1.
Figure 2.
Does the data support the idea that smells can trigger stored memories?
Claim:
Evidence:
Reasoning:
Which part of the brain is MOST involved in forming long-term memories associated with smells?
Using the table and Figure 1, compare memory recall accuracy when participants smelled a scent connected to a past experience versus a scent with no personal meaning.
Which observation provides evidence that sensory receptors in the nose respond to chemical stimuli?
Explain how the olfactory system and the brain work together when a person recognizes a familiar smell.
Based on the table and figures, describe the pattern in reaction time when a memory-triggering scent is detected compared to a neutral scent.