The Week is Half Over!

Homework:-Enzyme chart with reading (also use section 33 in textbook)
-visit Mrs. Stein in her office for a homework pass!
-sign up for science contest (for extra credit)
-Nutrient lab due some time in class on Friday

First in class, we discussed nutrients and here's what we discussed...

I -testing for carbs-simple--SMALL, less energy
                          -complex--BIG, more energy (starch)

II -testing for protein---> amino acids

III -testing for fat (lipids)--->glyceol & fatty acids

IV - testing for food <UNKNOWN>

Nutrient Lab

Today, we got our new lab groups and STARTED the nutrient lab. We only did the starch part of the lab.
We had to put starchy water into a beaker and then we added iodine. If the test was positive, then the startchy water would turn blue-ish black...

here's what it looked like when we put the iodine in.. (the iodine started out being orange-ish brown)
When we stirred that up, the whole thing turned darker and black and dark blue.


Next Scribe is.....Yvette

Sphincter Time!!!!!!!!!!!!!!!!!!!!!!

Sup Everybody

In class we took notes here are tha main ideas. The food goes through the one way tube called the ailementary canal. It starts with the mouth where mechanical digestion (teeth) and chemical digestion (Saliva, contains enzyme Salivary Amylase) break food down. It then goes to the esophagus, which connect the pharynx (throat) to the stomach. It enters stomach past a Sphincter, which closes to keep food and stomach acid from going back into esophagus. The stomach is a muscular sace lined with mucus that expands and contracts to perform mechanical digestion. It also uses chemical digestion by activating pepsin that breaks down proteins. Nex is the small intestine beginning with the duodenum, Here carbs, lipids and everything else is digested here and nutrients are absorbed. The SI is lined with Villi which increase surface area. In the large intestine water and indigestible junk is absorbed, bacteria absorbs the vitamin K in the food and you are keft with FECES. The other structures involved that arent places the food travels are the liver which makes bile qhich emulsifies fat, gall bladder which stores bile, and pancreas that makes enzymes.

HOMEWORK: Pre-lab about nutrients and read 30.2.

An Airhead for your troubles

I know you want it

The Next Scribe is Melissa

Happy Monday

when we got to class we settled after picking up a note card and new unit packet then mrs stein passed back our grade reports. then we talked about the science contest! if you participate you can get extra credit but don't ask how much because mrs. stein hasn't decided. pretty much its a contest on how well you answer a few questions relating to science on april 14th. only one period that you sign up for to go to the advent is when you will be competing. you create a team of four people and freshman are more valuable because we haven't taken as many science classes as upperclassmen (yay us!) if you want more details read the website: https://webmail.glenbrook225.org/owa/redir.aspx?C=caf88c51729148829a2f662a0033e31e&URL=http%3a%2f%2fwww.glenbrook225.org%2fsouth%2fdepartments%2fscience%2fPages%2fhome.aspx. after we talked about getting new seats when people return from spring break. also we filled out a post card about how comfortable we felt with dissection and if we wanted to do a lot of dissecting or not and who we worked well with. these will help mrs. stein determine new lab groups. new we talked about what we already know about our new unit! 

- teeth and saliva break down food

- layer of mucus protects stomach from acid which would destroy the stomach

- small intestine is 30ft?

- large intestine is 10ft?

- our bodies take all nutrients from food and give it to the blood then the blood transports the nutrients (this happened in the small intestine)

- waste is released

- nutrients: 

         1. protein   2. fat   3.carbohydrates   4. water   5. vitamin   6. minerals 

goals of digestion:

         breaking stuff down, absorbing nutrients and releasing waste

HOMEWORK: 

30.3 with flow map (starting with mouth ending with anus) 

see mrs. stein to talk about the last quarter for a homework pass by tuesday

extra credit if you enter the science contest and if you place top 4 you get even more extra credit!