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Chapter 4 : Parts of a cell. Cell Theory: 1600’sRobert Hooke – discovered cells. Organells; parts or “organs” of cells. Nucleus: control center. Nuclear membrane Chromatin – DNA tangles Nucleolus – produces ribosomes. Plasma or Cell Membrane. Maintains homeostasis

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chapter 4 parts of a cell

Chapter 4 : Parts of a cell

Cell Theory: 1600’sRobert Hooke – discovered cells

nucleus control center
Nucleus: control center
  • Nuclear membrane
  • Chromatin – DNA tangles
  • Nucleolus – produces ribosomes
plasma or cell membrane
Plasma or Cell Membrane
  • Maintains homeostasis
  • Controls what goes into and out of the cell
cell wall plants and fungus cells only
Cell Wall – Plants and Fungus cells only
  • Function – protection and support
  • Made up of cellulose or chitin
cytoplasm
Cytoplasm
  • Material that organells are suspended into
endoplasmic recticulum er
Endoplasmic Recticulum (ER)
  • Function – assembly and transport of proteins
  • Folded system of membranes
  • Two types of :
    • Rough ER- ribosomes
    • Smooth ER
golgi complex
Golgi Complex
  • Function – receives proteins from ER, packages and ships proteins
lysosomes
Lysosomes
  • Function – digestion, (worn out cell parts, food particles, invading bacteria)_
vacuole
Vacuole
  • Membrane bound organelle, bubble
  • Function – store food, store waste
mitochondria power house
Mitochondria – Power House
  • Function: furnish energy by breaking down “food”
  • Production of ATP
chloroplasts plants only
Chloroplasts – plants only
  • Function – photosynthesis, a type of plastid
cilia and flagella movement
Cilia and flagella- movement
  • Allows cells to move
  • Cilia – short hairlike structures surrounding the cell
  • Flagella - tail
two types of cells
Prokaryote

No organells

No nucleus

Ex. Bacteria

Eukaryote

True cells

Have a nucleus and membrane bound structure

All other cells

Two Types of Cells

http://www.earthlife.net/prokaryotes/welcome.html

cell size
Cell Size
  • Cells need surface area large enough to allow for the exchange of materials.
  • Which cell above has the most surface area?
  • Does it matter if a cells grows too large?