Everything we know about the world around us comes through our senses: sight, hearing, touch, smell, and taste. We detect this information through specialized cells in our eyes, ears, skin, nose, and tongue. Nerve impulses are then sent for processing in the brain.
The new Senses Gizmo introduces students to how each of these senses detect and process outside stimuli. In the Neural Pathways tab of the Gizmo, students can pick a stimulus and a sense organ to see how that stimulus triggers a neural pathway to the associated region of the brain. The Sense Organs tab gives students an up-close look at how sensory neurons are stimulated, from the light-sensitive rods and cones in the retina to the chemoreceptors inside a taste bud. Students will investigate how each of our senses are similar and how they are different.