hierarchy of organization
DESCRIPTION
Hierarchy of organization. Cells → Tissues → Organs → Organ Systems → Organism. What is cell specialization?. A less specialized cell (stem cell) becomes a specific cell. Ex: nerve cell. What are the difference in stem cells?. Embryonic Stem Cells. Adult Stem Cells. - PowerPoint PPT PresentationTRANSCRIPT
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Hierarchy of organization
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Cells →Tissues → Organs → Organ
Systems → Organism
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What is cell specialization?
• A less specialized cell (stem cell) becomes a specific cell.
• Ex: nerve cell
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What are the difference in stem cells?
Embryonic Stem Cells• These are the stem cells
found in the embryo just after fertilization occurs.
• These stem cells undergo changes to become all the various cells in your body.
Adult Stem Cells• An undifferentiated cell,
found among differentiated cells in a tissue or organ that can renew itself and yield some or all of the major specialized cell types of the tissue or organ
• Different than embryonic because it can only be a cell of that organ or tissue.
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Practice
• What kind of cell in the human body might have a ton of mitochondria in it? ___________________
• What cellular structures might the enzyme-
producing cells in the pancreas contain a lot of? _____________________*Hint: What is an enzyme?
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How is the structure of each cell related to its function?
Nerve cellSperm cellMuscle cellRed blood cell
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What causes cell differentiation?
• All cells are controlled by ___?___• For each specific cell a different section of
DNA is turned on allowing it to be specific for its job.
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Reflection
• What if a mutation caused the sperm cell and the red blood cell to change shapes? How would this affect the cells ability to do their job?
• What impact would this have on future cells they created?
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How do cells communicate?
• What process takes place as you burn yourself?
• Nerve cell sends signals to muscle cells to move your hand away from the flame!
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Sending and receiving signals
• Hormones: Chemical signal released by cell to send a message
• Receptor proteins: Proteins that receive chemical messages