Warm up:Hand in cells and tonicity foldable-H onlySummarize Passive Transport

HW: Finish worksheetQuiz on cell transport next Monday-CP, Tuesday-H

Review passiveA scientist takes 3 fresh water ameba and places them in 3 solutions: 5M salt solution, distilled water and pond water (.5M salt). 1. What is going to happen to each ameba, which has .5M of salt in its cell?Saltwater-Distilled water-Pond water-

2. Which solution is:hypertonic to amebahypotonic to amebaisotonic to ameba

Practice probs/go over hw

Review Passive-Starch/IodineIodine is an indicator, starts light brown, turns dark purple/black in presence of starch.

If we placed a bag with a semi-permeable membrane filled with starch in a solution containing iodine, what would happen? Iodine can pass through the membrane, but starch cannot.

What color will the bag be at the end?What color will the solution outside the bag be?

Review Passive-Starch/IodineBag will be purple-iodine diffuses inside to where starch isSolution will stay light brown, starch can’t leave bag

Active TransportEssential question: How does form relate to function?

● Active transport- movement of molecules across a membrane that requires energy-usually in the form of ATP○ moves molecules against concentration gradient (low to high)○ Types:

■ protein pumps■ Bulk transport

● endocytosis● exocytosis

Protein Pumps● are used to transport small molecules and ions against concentration

gradient (low to high)○ usually involves ATP binding to protein, changing its shape

Sodium-Potassium Pumphttp://www.youtube.com/watch?v=P-imDC1txWw - Sodium potassium pump video

Bulk Transport-big things● endocytosis-taking material into the cell

○ phagocytosis-cell extends cytoplasm around food particle, creates food vacuole and engulfs it■ usually large particles

○ pinocytosis-tiny pockets form in cytoplasm, takes in liquid/small particles, pinches off to form vacuole

Bulk Transport Continue● exocytosis-releases cellular material by fusing vesicle/vacuole with

membrane and dumping contents outside of cell○ Usually vesicles are sent by Golgi or digested material from

lysosomes

Endo/exo cytosis video

ClosureMake up a test question-Pass to neighbor

Respiratory system

Circulatory system

http://www.dnatube.com/video/5331/How-the-Respiratory-System-Works

Answer these with group1. Blood that comes from the veins has a high concentration of which gas, CO2 or O2? 2. What process did the cells of your body undergo to release this gas?3. When the blood from the veins makes it to the alveoli, the gas from question 1 ___________ out of the blood and into the alveoli space so it can be expelled from the body4. Meanwhile, the blood picks up which gas from the alveoli that we breath in?