7th Grade 3/12 Do Now:

1
7th Grade3/12 Do Now

• Finish Cell Theory TimeLine

2
Cell Theory

• Hooke first person to discover and name cells
• Schleiden discovers plants are made of cells
• Schwann discovers animals are made of cells
• Virchow discovers cells come from other cells

3
Cell Theory

• How does Cell Theory answer these questions
• What makes something alive?
• What do cells do?
• Where do cells come from?

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THE CELL
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COMMON CELL TRAITS

• A cell is the smallest unit that is capable of
  performing life functions.

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COMPARING CELLS

• The size shape of a cell relates to its
  function. (job it does)

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Prokaryotic Cells(proh KAYR ee yah tihk)

• cells without membrane-bound structures
• EX bacteria
• pond scum

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7th Grade3/13 Do Now

• Color and label the picture of the animal cell
  and plant cell for the following parts of the
  cell
• Cell membrane orange
• Cytoplasm sky (light) blue
• Cell wall yellow green

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Eukaryotic Cells(yew KAYR ee yah tihk)

• cells with membrane-bound structures
• EX animals, plants, fungi and protists

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CELL WALL

• protects the cell
• gives shape
• is made of cellulose
• A cell wall is found in plants, algae, fungi,
  most bacteria.

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CELL MEMBRANE

• Outer covering, protective layer around ALL
  cells
• For cells with cell walls,the cell membrane is
  inside the cell wall
• Allows food, oxygen, water into the cell
  waste products out of the cell.

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CYTOPLASM

• gelatin-like inside cell membrane
• constantly flows
• aka protoplasm

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CYTOSKELETON

• scaffolding-like structure in cytoplasm
• helps the cell maintain or change its shape
• made of protein

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Organelle Foldable

• Take a piece of paper and fold it lengthwise (hot
  dog).
• At the top label Cell Organelles
• On the same side cut the paper into 7 flaps
  (approximately 4 lines)
• Label the 7 flaps ribosome, chloroplast,
  mitochondria, endoplasmic reticulum, golgi
  bodies, vacuole and lysosome.
• On the inside, define and draw the organelle.

15
Organelle Foldable

• Take a piece of paper and fold it lengthwise (hot
  dog).
• At the top label Cell Organelles
• On the same side cut the paper into 7 flaps
  (approximately 4 lines)
• Label the 7 flaps ribosome, chloroplast,
  mitochondria, endoplasmic reticulum, golgi
  bodies, vacuole and lysosome.
• On the inside, define and draw the organelle.

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NUCLEUS

• Directs all cell activities
• Contains instructions for everything the cell
  does
• These instructions are found on a hereditary
  material called DNA
• Usually the largest organelle

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NUCLEAR MEMBRANE

• separates nucleus from cytoplasm
• controls movement of materials in out of nucleus

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NUCLEOLUS

• Aka little nucleus
• Found in the nucleus

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CHROMATIN

• contains genetic code that controls cell
• made of DNA proteins

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NUCLEUS

• Directs all cell activities
• Contains instructions for everything the cell
  does
• These instructions are found on a hereditary
  material called DNA
• Usually the largest organelle

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NUCLEAR MEMBRANE

• separates nucleus from cytoplasm
• controls movement of materials in out of nucleus

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NUCLEOLUS

• Aka little nucleus
• Found in the nucleus

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CHROMATIN

• contains genetic code that controls cell
• made of DNA proteins

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ENDOPLASMIC RETICULUM

• A series of folded membranes that move materials
  (proteins) around in a cell
• like a conveyor belt
• Smooth ER ribosomes not attached to ER
• Rough ER ribosomes attached to ER

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RIBOSOMES

• Make proteins
• Float freely or attached to the endoplasmic
  reticulum (ER)
• Ribosomes are made in the nucleolus

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GOLGI BODIES (GAWL jee)

• Stacked flattened membranes
• Sort and package proteins

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VACUOLES

• Temporary storage spaces
• Store food, water, waste

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LYSOSOMES (LI suh sohmz)

• The word "lysosome" is Latin for "kill body."
• The purpose of the lysosome is to digest things.
  They might be used to digest food or break down
  the cell when it dies.
• Break down food molecules, cell wastes worn out
  cell parts

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CHLOROPLASTS

• Green organelles that make food
• found only in plant cells

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CHLOROPHYLL

• A green pigment that gives leaves stems their
  color
• Captures sunlight energy that is used to produce
  food called glucose
• Glucose is a type of sugar

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MITOCHONDRIA

• Organelles that release energy from food
• This energy is released by breaking down food
  into carbon dioxide
• AKA the powerhouse b/c they release energy from
  food
• Some muscle cells have 20,000 mitochondria