diffusion - review molecules move from areas of high concentration to areas of low concentration how...

Diffusion - Review • Molecules move from areas of high concentration to areas of low concentration • How do diffusion/osmosis/active transport differ? • https://www.youtube.com/watch?v =IaZ8MtF3C6M

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Diffusion - Review• Molecules move from areas of high

concentration to areas of low concentration• How do diffusion/osmosis/active transport

differ?• https://www.youtube.com/watch?v=IaZ8MtF3

C6M

https://www.youtube.com/watch?v=IaZ8MtF3C6M

Page 2: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Page 3: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Cell Structure & Function

http://koning.ecsu.ctstateu.edu/cell/cell.html

Page 4: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Cell Theory• All living things are made up of cells. • Cells are the smallest working units of all living

things. • All cells come from preexisting cells through

cell division.

Page 5: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Examples of Cells

Amoeba Proteus

Plant Stem

Red Blood Cell

Nerve Cell

Bacteria

Page 6: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Prokaryotic• Do not have structures

surrounded by membranes

• Few internal structures

• One-celled organisms, Bacteria

http://library.thinkquest.org/C004535/prokaryotic_cells.html

Two Types of CellsEukaryotic

• Contain organelles surrounded by membranes

• Most living organisms

Page 7: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

“Typical” Animal Cell

http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif

Page 8: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

http://waynesword.palomar.edu/images/plant3.gif

“Typical” Plant Cell

Page 9: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Cell Membrane

• Outer membrane of cell that controls movement in and out of the cell

• Double layer

http://library.thinkquest.org/12413/structures.html

Page 10: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Cell Wall

• Most commonly found in plant cells & bacteria

• Supports & protects cells

http://library.thinkquest.org/12413/structures.html

Page 11: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Nucleus • Directs cell activities• Separated from cytoplasm by nuclear

membrane• Contains genetic material - DNA

Page 12: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Cytoplasm• Gel-like mixture• Surrounded by cell membrane• Contains hereditary material

Page 13: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Endoplasmic Reticulum• Moves materials around in

cell• Smooth type: lacks

ribosomes• Rough type (pictured):

ribosomes embedded in surface

http://library.thinkquest.org/12413/structures.html

Page 14: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Ribosomes

• Each cell contains thousands

• Make proteins• Found on ER & floating

throughout the cell

http://library.thinkquest.org/12413/structures.html

Page 15: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Mitochondria• Produces energy through

chemical reactions – breaking down fats & carbohydrates

• Controls level of water and other materials in cell

• Recycles and decomposes proteins, fats, and carbohydrates

http://library.thinkquest.org/12413/structures.html

Page 16: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Golgi Bodies

• Protein 'packaging plant'

• Move materials within the cell

• Move materials out of the cell

http://library.thinkquest.org/12413/structures.html

Page 17: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Lysosome• Digestive 'plant' for

proteins, fats, and carbohydrates

• Transports undigested material to cell membrane for removal

• Cell breaks down if lysosome explodes

http://library.thinkquest.org/12413/structures.html

Page 18: Diffusion - Review Molecules move from areas of high concentration to areas of low concentration How do diffusion/osmosis/active transport differ?

Chloroplast

• Usually found in plant cells

• Contains green chlorophyll

• Where photosynthesis takes place

http://library.thinkquest.org/12413/structures.html

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