LATE ARRIVAL WOOOOOOOO!

4/5/11

Agenda
-Hand in flow map
-Notes -> organs and digestion
-Introduce enzymes + Nutrient lab

Homework
-Nutrient Lab - Prelab - tomorrow
-Read 30.2 tomorrow
-Enzyme Reading / Chart - Thursday

We started off class by handing in our flow chart and picked up 5 papers which were the Enzyme Reading and chart and 3 diagrams. After we did our notes and we were given a chance at the end of class. Mrs. Stein also attempted to show us what the enzyme rennin does to milk, but was unable.

DIGESTION

-Breaks down large molecules into smaller molecules which can be used by cells
-Physical / Chemical digestion
-Alimentary canal is a one way tube which food passes through the body
-Accessory structures do not carry food, but aid in digestion

MOUTH

-Mechanical digestion (Teeth crushes food)
-Saliva moistens food and contains salivary amylase
-Starch into simpler sugars

ESOPHAGUS

-Muscular - connects pharynx and stomach
-Peristalsis
-Waves of muscle contraction
-Bolus enters the stomach through a sphincter

STOMACH

-Muscular sac lined with mucus
-Protection + lubrication -> Protects from burning the stomach
-Mechanical digestion
-Chemical digestion
-HCI kills bacteria, lower pH to activate pepsin
-Proteins break down
-Peptic ulcer - hole in stomach wall caused by bacteria

SMALL INTESTINE

-Duodenum - 1st part of the small intestine
-Enzymes and fluids here
-Carbohydrates, lipids, and proteins digested here
-Nutrients absorbed
-Lined with finger-like protections called villi
-Increases SURFACE AREA of absorption
-Water, cellulose, and indigestible remain

ACCESSORY STRUCTURES

-Liver produces bile which emulsifies (breaking a part for larger SURFACE AREA) fat
-Gallbladder stores bile
-Pancreas produces enzymes

LARGE INTESTINE

-Absorbs water from undigested material
-Bacteria synthesizes from vitamin K

The next scribe is..........
DRUMMMMMMMMMROLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
Michael R