Eating Like a Cell- Bag is the cell membrane- You can only work from within the membrane- Your hands, the dental floss, and scissors are the

organelles

- Goal: Get the food inside the cell without ever creating a hole for the inside fluid to fall out.- Two pieces of food must be together and

free floating for you/the cell to be able to eat.

Cell Features

1. Cell Theory1. All living things are made of one or more cells2. Cells are the basic units of structure and function in organism3. All cells arise from existing cells

Cell Features Cont.

2. Cells Gotta Be Small!! Why?(Nash: bgrm, smlrm activity)

- small cells = high Surface to volume ratio

- can get to everything, communicate much quicker

- If ever asked why are cells small, your answer is to have high surface to volume ratio!

• Pro vs. Eu How Cells work

Cell Features Cont.

3. Two Types of Cells:

Prokaryote- smallest and simplest

(very small)-single cells only-Example: Bacteria- lack membrane bound

organelle (nothing on the inside has its own membrane)

Eukaryote- eu = true- kary = nucleus- Everything except

bacteria- cells have true nucleus

and other membrane bound organelle- Examples: human cell,

plant Cells, animal Cells

Together draw picture on the board of Pro and Euk Cell

Organelle – structure with a specialized function inside a cell

Better Size Comparison

Pro: (Bact only) DNA but no nucleus Ribosomes Flagellum 1/10th the size

Euk: (any but bact) DNA in a nucleus Ribosomes Flagellum Chloroplast & Mito 10x the size

Cells at work

• Gaggle tube video – Immunity at work by a cell

• Paramecium at work

http://images.google.com/imgres?imgurl=http://evolution.berkeley.edu/evosite/lines/images/cells.gif&imgrefurl=http://evolution.berkeley.edu/evosite/lines/IIDmolecular.shtml&h=275&w=511&sz=18&hl=en&start=4&um=1&usg=__hgtBxS6jVrzjbN9OyDwgICeDJds=&tbnid=IXWsNpEjFuwLjM:&altq=plant+and+animal+cells,animal+cells,&tbnh=70&tbnw=131&prev=/images%3Fq%3Danimal%2Bcell%2Bvs%2Bplant%2Bcell%26um%3D1%26hl%3Den

Two Types of Eukaryotic Cells: Animal vs. Plant Cells (if can under eukaryotic)

Animal Cell- Shape is flexible because it has NO cell wall-Has NO chloroplast, and therefore are not green

Plant Cell- Shape is rigid because it has a cell wall-Has chloroplast, where light is caught

Much more to come later . . . .

4. Cell Membranes – all cells have

A. Multiple Names1. Cell Membrane2. Plasma Membrane3. Semi-Permiable Membrane

4. Phospholipid BilayerPolar head and non-polar tails

hydrophilic and hydrophobic

Does one of these things look familiar?

B. Proteins embedded in bilayer1. Helps “stuff” move in and out of cells

stuff = sugar, K+, Na+, steroids, hormonesstuff – molecules, ions

Organelle Analogy Activity

• Ted's animated cell

Organelle (Sx & Fxn or What do they look like, and what is their job?)

• Ribosome• Mitochondria• Chloroplast• Vacuole• Flagellum• Cilia• Cell Membrane• Cell Wall

What happens when you put a bunch of cells together?

Cells tissue organ organ system organisms

http://www.google.com/imgres?imgurl=http://asweknowit.net/images_edu/DWA%25205%2520organization%2520pictorial.jpg&imgrefurl=http://asweknowit.net/MIDDLE_SCH/DWA_1_%2520cells.htm&usg=__1dk-xqKJTqoNPao7vV9fLn8ofS0=&h=909&w=725&sz=63&hl=en&start=24&sig2=w24rwijJjPbuVfDVSYfaVA&zoom=1&um=1&itbs=1&tbnid=WtofC84nqnAghM:&tbnh=147&tbnw=117&prev=/images%3Fq%3Dcell%2Borganization%26start%3D20%26um%3D1%26hl%3Den%26sa%3DN%26ndsp%3D20%26tbs%3Disch:1&ei=VuqfTLDhHMT48Ab8zpCUDQ

http://water.me.vccs.edu/courses/ENV108/clipart/MICRO-labeled.gif

A.

B.

C

E.

F. D. This is that thing that controlsthe amount of light that hits theslide

http://www.teachnet.ie/tburke/cell/microscope.jpg

Looking at Cells Magnification

Ocular Lens X Objective Lens Resolution

Is it blurry? High Resolutionis not blurry

Types of Microscope (Read up on own)(for each know what you can see, and why you can see it that way)1. Compound Light Microscope

2. Transmission Electron Microscope, TEM

3. Scanning Electron Microscope

4. Scanning Tunneling Microscope

Organelle and Pro vs Euk Quiz• What is it that eukaryotes have that

prokaryotes do not?• What is the function of the following

organelle:– Nucleus -- Mitochondria– Plasma membrane -- Vacuoles– Ribosomes -- Chloroplast