Everything you know about osmosis = … (keep a numbered list) Question of the Day 12-14

Everything you know about osmosis = … (keep a numbered list)

Question of the DayQuestion of the Day12-1412-14

ObjectivesObjectivesDescribe how the structure of the Describe how the structure of the

plasma membrane allows it to function plasma membrane allows it to function as a regulatory structure and/or as a regulatory structure and/or protective barrier for a cell.protective barrier for a cell.

12-1412-14

Unit # 4 Test = Tuesday

Dec. 21

Examples of passive transport =

Carrier proteins – Carrier proteins – proteins that assist facilitated proteins that assist facilitated

diffusiondiffusion

Ion channels – Ion channels – proteins transport ions from proteins transport ions from high concentration to high concentration to

lower concentrationlower concentration IonsIons like Na+, Ca+, etc like Na+, Ca+, etc are not soluble in lipidsare not soluble in lipids, so , so

they must travel through proteins channelsthey must travel through proteins channels Ion channels are ion specificIon channels are ion specific Some channels are always open, some have gateSome channels are always open, some have gateGates open from stimuli: stretching of cell membrane Gates open from stimuli: stretching of cell membrane

electrical or electrical or chemical chemical signals signals

Active TransportActive Transport – – transport of materials transport of materials against a concentration gradient – against a concentration gradient –

requires energyrequires energy ATPATP (adenosine tri-phosphate) – (adenosine tri-phosphate) –

the the ENERGY moleculeENERGY molecule for the cell for the cell Breaks down from Breaks down from

ATP ATP ADP (Adenosine ADP (Adenosinedi-phosphate)di-phosphate)

Hydrolysis of the Hydrolysis of the phosphate phosphate releasesreleasesenergyenergy

Active TransportActive Transport

Active Transport ExampleActive Transport Examplehttp://www.youtube.com/watch?v=1ZFqOvxXg9M&featurhttp://www.youtube.com/watch?v=1ZFqOvxXg9M&feature=relatede=related

In Lab:

1. What was the purpose of the vinegar?

2. What hypertonic solution did you put the egg in?

3. What did you use for a hypotonic solution?

Question of the DayQuestion of the Day12-1312-13

One thing you know about active transport = ???

Question of the DayQuestion of the Day12-1512-15

Unit # 4 Test = Tuesday

Dec. 21

ObjectivesObjectivesDescribe how the structure of the Describe how the structure of the

plasma membrane allows it to function plasma membrane allows it to function as a regulatory structure and/or as a regulatory structure and/or protective barrier for a cell.protective barrier for a cell.

12-1512-15

Sodium-potassium PumpSodium-potassium Pump – – transfer protein exampletransfer protein exampleTransfers NaTransfers Na++ out and K out and K++ in inCreates electrical gradient which is Creates electrical gradient which is

important for important for nerve impulsesnerve impulses http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_the_sodium_potassium_pum

p_works.html

Na+ / K+ PumpNa+ / K+ Pump

EndocytosisEndocytosis – – when a cell when a cell surrounds surrounds

and takes in material and takes in material from the environmentfrom the environment

Uses ATPUses ATP

EndocytosisEndocytosis

Pinocytosis – Pinocytosis – Transport of Transport of fluidsfluids into the cell into the cell

Phagocytosis – Phagocytosis – Transfer of large particles / cells into the cellTransfer of large particles / cells into the cell

Phagocytes – Phagocytes – Cells that Cells that ingest bacteria / viruses and ingest bacteria / viruses and

lysosomes fuse w/ vesicle to destroy them lysosomes fuse w/ vesicle to destroy them before harm donebefore harm done

http://www.youtube.com/watch?v=1w10R9lv7eQ

First = make up

Second = extra credit – complete the graphic organizer for chapter 5 of the online textbook – when you get it correct, raise your hand and show me

Make up and E.C.Make up and E.C.12-1512-15

My.hrw.com

Chapter 4

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