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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)