Smell, Taste, and Touch

• Tongue
• Papillae: those bums on our tongue. Help grip food while your teeth are chewing. Contain taste buds.
  
• Sweet is located on the tip of your tongue and it is sensed when our tastebuds come into contact with sugar.
• Salty is sensed when salty sensitive tastebuds come into contact with salt. It is located on the front side of the tongue.
• Sour is sensed when our tastebuds comes into contact with acid. Located on the back side of the tongue.
• Bitter is sensed when our tastebuds come in contact with an alkali metal. Located on the base of the tongue.
• Spicy is sensed when the no receptors in our mouth come into contact with a chemical that irritate it.
• Smell
• Pheromones: chemical messengers that are picked up through our sense of smell.
• Touch: receptors are located in our skin.
• Gate Control Theory of Pain: the nervous system blocks or allows pain signals to pass to the brain.
• Vestibular Sense: tells us where our body is oriented in space. Our sense of balance. Located in our semicircular canals in our ears.
• Kinesthetic Sense: tells us where are body parts are. Receptors located in our muscles and joints.