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Do Now
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Regents Review Day 05The Cell
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The Cell Review
• The organelles in a cell work together to carry out the metabolic processes that are required to stay alive.
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The Cell Review
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The Cell Review• Levels of
organization:1. Organelles2. Cells3. Tissues4. Organs5. Organ systems6. Organism
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The Cell Review
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The Cell Review• Organelles:– Nucleus – “the brain” –
stores information and controls cell functions, like the brain
– Ribosomes – make proteins
– Mitochondria – “powerhouse” makes energy in the form of ATP during cellular respiration.
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The Cell Review
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The Cell Review• Organelles:– Cell membrane:
• Surrounds and protects the cell, like skin
• Allows gas exchange, like lungs
• Allows waste to leave, like excretory system
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The Cell Review
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The Cell Review
• Receptors are proteins on the surface of the cell that receive signals (reception) and allow cells to communicate with each other
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The Cell Review
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The Cell Review
• Transport:– Diffusion
• No energy needed• High to low
concentration– Active Transport
• Uses ATP energy• Low to high
concentration– Osmosis
• Diffusion of water
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The Cell Review
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The Cell Review
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The Cell Review
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The Cell Review
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The Cell Review
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Homework #38• R.B. p. 13-16, #4, 7, 10, 13, 27 (full
answers only)