Eating Like a Cell
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Transcript of Eating Like a Cell
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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.
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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
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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!
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• Pro vs. Eu How Cells work
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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
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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
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Cells at work
• Gaggle tube video – Immunity at work by a cell
• Paramecium at work
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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 . . . .
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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?
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B. Proteins embedded in bilayer1. Helps “stuff” move in and out of cells
stuff = sugar, K+, Na+, steroids, hormonesstuff – molecules, ions
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Organelle Analogy Activity
• Ted's animated cell
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Organelle (Sx & Fxn or What do they look like, and what is their job?)
• Ribosome• Mitochondria• Chloroplast• Vacuole• Flagellum• Cilia• Cell Membrane• Cell Wall
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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
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http://water.me.vccs.edu/courses/ENV108/clipart/MICRO-labeled.gif
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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
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Looking at Cells Magnification
Ocular Lens X Objective Lens Resolution
Is it blurry? High Resolutionis not blurry
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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
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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