Anatomy & Physiology of Taste

Monica & Mikal:Anatomy
J.C.:Physiology

ANATOMY:5 basic tastes are sour, sweet,salty and umami

Taste Receptors (taste buds) are located in the stratified squamous epithelial lining of the sides of circumvallate,foliate and also located on the fungiform papillae on the tongue.

-The tongue contains many ridges and valleys called papillae. There are four types of papillae
-Circumvallate papillae: shaped like flat mounds surrounded by a trench & found at the back of the tongue
All papillae except filiform contain taste buds (so the very center of your tongue which only has filiform papillae is "taste-blind")
- Bitter and sweet substances bind into receptor sites which release other substances into the cell.

Sour substances contain H+ ions that block channels in the membrane.
-Salty substances break up into Na+ ions which flow through the membrane directly into the cell.
-The chorda tympani nerve conducts signals from the front and sides of the tongue.
- The glosso-pharyngeal nerve conducts signals from the back of the tongue.
-The vagus nerve conducts taste signals from the mouth and the larynx.
-Umami is the taste of the amino acids like in milk,cheese and Asian dishes anything that cointains monosodium glutamate.

udit-humanorgans.blogspot.com/2010/12/tongue.html

external image taste%20test.jpg
www.ri.net/.../Sites/shuttle/taste%20test.asp

PHYSIOLOGY-taste receptors cell in the tongue also called taste buds have sensors that identify the proteins and substances going into the body.

-The signals of what is going into your body go to the brain stem where the brain decides if the substance going into the body is harmful or not.
-The taste receptors imid ions which the attract the proteins that enter are mouths.
-The nerves in are mouth respond to the proteins and send signals to the brain.
-From there the brain then decides on the taste.
-taste is extremely essential for the survival of us because it tell us what we are eating or drinking.



HOMEOSTASIS-The taste is what keeps are body protected from what is going into are bodies.

-Look at it this way if something bad wants to enter are bodies the easiest way for it to enter are body is from the mouth.
-So taste is very important because it can help us identify what we are eating and is about to enter the body, and it tells us if something bad is going to enter are bodies.
-But taste also fits in well with the smell because without the sense of smell we cannot taste.

http://www.mhhe.com/socscience/intro/cafe/prof/imagebank/taste-receptors43.jpg