How We Taste

Taste is a survival instinct: we instinctively dislike bitter or sour tastes in case food is off or poisonous. An introduction to the tongue and how it helps us to taste. Biology - Being Human - Learning Points. Taste is a survival instinct which helps us to know when food is poisonous or bad. Our tongues are covered with thousands of taste receptors. There are five key types of taste: sweet, salt, sour, bitter and umami. As we get older, our tastes change. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.