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Structure and Function

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Presentation on theme: "Structure and Function"— Presentation transcript:

1 Structure and Function
Cells Structure and Function

2 Cell Vocabulary Make a flashcard for these terms:
Endoplasmic reticulum Cell Gogi apparatus Cell theory Lysosome Cell membrane Vacuole Cell wall Chloroplast Nucleus Mitochondria Cytoplasm Lipid bilayer Prokaryote Selective permeability Eukaryote Diffusion Organelle Active transport Ribosome

3 Cell Theory All living things are composed of cells. Cells are the basic units of structure and function in living things. New cells are produced from existing cells.

4 1600 Cell Shape and Size Press your pen to your paper to create dot.
How many cells do you think would fit within that dot???? 1600 Cell video clip—2:30, on flash drive

5 Prokaryotic vs Eukaryotic
These 2 types of cells differ in complexity and general structure

6 Lack internal membrane-bound structures Unicellular organisms
Prokaryotic Cells Lack internal membrane-bound structures Unicellular organisms About 1/10th the size of a Eukaryotic cell. Example: bacteria Yogurt on a slide?

7 Prokaryotic Cell

8 Multicellular organisms Membrane bound organelles Mostly animal cells
Eukaryotic Cell Multicellular organisms Membrane bound organelles Mostly animal cells Present in all living things, except bacteria Cheek Cells on a Slide

9 Eukaryotic Cell

10 Add pics of prokaryotes and eukaryotes

11 Prokaryotic vs Eukaryotic POGIL

12 Plant and Animal Cells Look at p. 176 in your textbook.
Take a moment to look at the cells. What structures do plant cells have that animal cells do not?? Prokaryotici

13 Plant and Animal Cell Mystery
Flinn Lab—Use as an intro, so only try to ID

14 Despite cell diversity, ALL cells have 3 basic parts:
Basic Parts of a Cell Despite cell diversity, ALL cells have 3 basic parts: Cell Membrane and/or Cell Wall Cytoplasm Nucleus

15 Cell Wall provides support and protection for the cell.
Found in plants and many prokaryotes Very outside edge of the cell

16 The region of the cell that is within the plasma membrane
Cytoplasm The region of the cell that is within the plasma membrane Includes the fluid, cytoskeleton, and all organelles (except nucleus).

17 Cytoplasm

18 Nucleus Cells carry coded information in the form of DNA.
In some cells DNA floats freely inside the cell In other cells the DNA is found in a membrane- bound organelle: the NUCLEUS Most functions of a cell are controlled by the nucleus. The NUCLEOLUS is a small structure within the nucleus where ribosomes are assembled.

19 Control Center

20 Basic Parts Video Clip Youtube—Nucleous and Cytoplasm Song, 3:24

21 Nucleus Video Clip

22 Draw a cell and label all 3 basic parts
INTERACTIVE Draw a cell and label all 3 basic parts You do NOT need to include all the organelles

23 Cell Organelles Plasma Membrane Nucleus Mitochondria Ribosomes
Endoplasmic Reticulum Golgi Apparatus Cytoskeleton

24 The Cell Song! Available on Youtube and Itunes
The Cell Song…3:10 science music videos

25 Cell Organelle POGIL

26 Ribosomes (not an organelle - but important)
Present in the cytoplasm. Present with Rough ER. No membrane present. Each cell contains thousands Make proteins


28 Ribosome Video Clip

29 Endoplasmic Reticulum
System of tubes and sacs Moves materials around in cell Smooth type: lacks ribosomes Rough type (pictured): ribosomes embedded in surface

30 Smooth Endoplasmic Reticulum
Transports materials throughout the cell. Digests lipids. Produces proteins.

31 Rough Endoplasmic Reticulum
Covered with ribosomes. Produces proteins. Transports materials throughout the cell.


33 Video Clip Endoplasmic Reticulum

34 Golgi Bodies or Golgi Apparatus
Protein 'packaging plant' Move materials within the cell Move materials out of the cell


36 Golgi Apparatus Video Clip

37 Central Vacuole (Plant Cell Only)
Most plant cells have one large one. Filled w/ fluid. Helps maintains turgor pressure and shape of cell.

38 Chloroplast (Plant Cell Only)
Contains chlorophyll. Makes plants green. Uses light energy to make ATP & sugars. Photosynthesis takes place here.

39 Mitochondria Video Clips

40 Mitochondria, aka “Mighty-Chondria”
This organelle processes energy for a cell. It makes ATP by breaking down glucose to Carbon dioxide. (ATP = energy) Involved in cellular respiration Controls level of water and other materials in cell Recycles and decomposes proteins, fats, and carbohydrates Mitochondria even have their own DNA!


42 Let’s hear that Cell Song Again…

43 A quick review of cell organelles
3 Facts from the Brainpop on Cell Structures

44 INTERACTIVE Cell City Biology corner w/s

45 Cell Memory Chart

46 Cell Coloring! Quiz on Eukaryotic cell at next meeting!!
Plant and Animal Cell Coloring sheet Coloring Pages

47 Movement through the Membrane
Cell’s outer boundary Covers a cell’s surface and acts as a barrier between the inside and outside of the cell All materials enter and exit through the plasma membrane Membrane is SEMIPERMEABLE: allows only certain materials in and out. Balloon/Perfume Demo

48 Plasma Membrane Cell Membranes Rap 3:40

49 Movement through a membrane video Clip
Insights into cell membranes via dish detergent 3:50

50 and Active Transport Cell Homeostasis
Cell membranes help organisms maintain homeostasis by controlling what substances may enter or leave cells. There are two main ways of transporting materials into and out of a cell: Passive Transport and Active Transport

51 Passive Transport Passive transport occurs when substances cross the cell membrane without any energy by the cell Transport with NO Energy—riding a bike downhill Diffusion and Osmosis are the primary methods of Passive Transport

52 Diffusion Simplest form of passive transport
Movement of molecules from an area of higher concentration to lower concentration The difference in the concentration of molecules across a distance is called a CONCENTRATION GRADIENT Molecules will move from one area to another until it reaches EQUILIBRIUM, or a balance. Demo—dissolve sugar in water…give each group a beaker and watch it.

53 Sugar Cube Diffusion

54 Osmosis Osmosis is the passive (no energy required) transport of water across a cell membrane Water moves from areas of high concentration to low concentration When the concentration of solute molecules outside the cell is lower than inside the cell, the solution outside the cell is HYPOTONIC to the cell. In this situation water diffuses INTO the cell until equilibrium is established.

55 When the concentrations are equal=ISOTONIC
Osmosis If the solution outside the cell is higher than the inside the cell the solution is HYPERTONIC and the water diffuses out of the cell to reach equilibrium When the concentrations are equal=ISOTONIC



58 Osmosis Video Clip How Osmosis Works 1”41

59 Gummy Bear Osmosis Lab Biology Corner

60 Crossing the Cell Membrane Graph Activity
p.188, whole class

61 Active Transport When cells need to transport materials from an area of low concentration to high concentration (the opposite of what would naturally happen) it is called ACTIVE TRANSPORT, the cell needs to use ENERGY. Wire Strainer w/ fruit and juice example

62 Endocytosis The process by which cells ingest external fluid, macromolecules, and large particles.

63 Exocytosis Process by which a substance is released from a cell

64 Endo and Exo video clip Under 2 min, youtube

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