Life Science

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Life Science

• Chapter 6
• Tour of the Cell

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A micron is 10-9 millimeters
a
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Plant Cell
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Animal Cell
http//www.emc.maricopa.edu/faculty/farabee/BIOBK/
BioBookCELL2.html
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Cell Structures

• Cell Membrane
• Envelope surrounding the cell
• Regulated what goes in /out of cell
• See page 117

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Nucleus see page 124

• Contains most of the cells DNA
• DNA forms long fibers called chromatin
• Nucleolus- ball-like mass of fibers
• Contains parts that make up ribosomes

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Ribosomes see page 125

• Site where proteins are made
• Can be scattered or attached to ER

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Endoplasmic Reticulum see page 125

• Main manufacturing and transportation facility in
  cell
• May be rough-covered with ribosomes
• Or smooth- no ribosomes

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Golgi Apparatus see page 126

• changes, stores and directs proteins and other
  chemical products to different parts of the cell

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Vacuolessee page 126

• Large, membrane-bound sacs
• Usually used for storage

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Lysosomesee page 127

• Contain digestive enzymes that can break down
  materials inside cell
• act as safety officers by destroying harmful
  bacteria
• Recycle damaged organelles

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Mitochondriasee page 129

• powerhouse of cells
• Cellular respiration-burning sugar for energ

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Chloroplastssee page 128

• Photosynthesis occurs here
• Found in plant cells

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Cell Wall

• Protects plant cells
• Gives cells structural support

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Homework

• Page 132
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• 4 5
• 7,14, 15,
• 19