Brain and Taste, 2

Each taste bud, formed from a group of 50–150 receptor cells, is embedded in the surface of the tongue and makes contact with what you eat and drink via a taste pore. Different tongues have differing numbers of taste buds, ranging from 8,000-10,000 on average. Some individuals may have only a few hundred taste buds per square centimeter on the tip of their tongue, while others may have a thousand. Taste sensations produced within an individual taste bud also vary, since each taste bud typically contains receptor cells that respond to distinct chemical stimuli. This means that differing tastes are diverse in a single taste bud. Taste buds have sensitive microscopic hairs called microvilli that are direct chemoreceptors. They must come into contact with food and then they translate chemical signals in food into electrical signals that travel to the brain via the nervous system. Taste buds replace themselves every 10-14 days so if you decide to start eating healthier foods you can get accustomed to them quite quickly. More tomorrow.