Today

1
Todays Data Here

• Objective Here!

2
Brainteaser

• What is put on a table and cut, but never eaten?

3
Bell Work

• Prokaryotes lack
• cytoplasm.
• a nucleus.
• a cell membrane.
• genetic material.

4
Lets Review

• What is a prokaryotic cell?
• Who was the first person to coin the term cells?
• What does the cell theory say?
• Who developed the cell theory?

5
Cell Structure Function
http//koning.ecsu.ctstateu.edu/cell/cell.html
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Two Types of Cells

• Prokaryotic

Eukaryotic
Nucleus
No nucleus
7
Eukaryotic

• Contain organelles surrounded by membranes
• Most living organisms

Plant
Animal
http//library.thinkquest.org/C004535/eukaryotic_c
ells.html
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Eukaryotic Cells
9
Cell Parts

• Organelles

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Nucleus

• Is made of 4 parts
• Chromatin
• Nucleolus
• Nuclear Envelope
• Nuclear Pore

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Chromatin

• A network of strands that undergoes coiling into
  rod-like structures called chromosomes, just
  before the cell divides.

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Nucleolus

• Where the Ribosomal RNA (rRNA) is produced and
  where tRNA joins with proteins to form subunits
  of ribosome's

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Nuclear Envelope and Pores

• Nuclear Envelope Separates the nucleus from the
  cytoplasm

• Nuclear Pores permits the passage of proteins
  into and out of the nucleus

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Responsibility of the Nucleus

• Nickname The Control Center
• Function
• Holds the DNA
• Directs cell activities
• Separated from cytoplasm by
• nuclear membrane
• 4. Contains genetic material - DNA

15
Ribosomes

• Function
• makes proteins
• Each cell contains thousands
• Make proteins
• Found on ribosomes floating throughout the cell

http//library.thinkquest.org/12413/structures.htm
l
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Endoplasmic Reticulum

• Nickname Roads
• Function The internal delivery system of the
  cell

Rough ER
Smooth ER
No ribosome's Makes fats and lipids
Have Ribosome's Makes proteins
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Golgi Apparatus/Bodies
Nickname The shippers Appearance stack of
pancakes

• Function
• Protein 'packaging plant'
• Move materials within the cell
• Move materials out of the cell

http//library.thinkquest.org/12413/structures.htm
l
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Lysosome
Nickname Clean-up Crews Appearance circular,
but bigger than ribosomes

• Function
• to break down food into particles the rest of
  the cell can use and to destroy old cells
• Transports undigested material to cell membrane
  for removal

http//library.thinkquest.org/12413/structures.htm
l
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Peroxisomes

• Are abundant in cells that metabolize lipids in
  liver and yeast cells they detoxify alcohol.

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Centriole

• Found in animal cells only
• Involved in the organization of the mitotic
  spindle and in the completion of cytokinesis

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Vacuoles

• Membrane-bound sacs for storage, digestion, and
  waste removal
• Contains water solution
• Help plants maintain shape

http//library.thinkquest.org/12413/structures.htm
l
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Mitochondria
Nickname The Powerhouse Function Energy
formation Breaks down food to make ATP ATP is
the major fuel for all cell activities that
require energy
http//library.thinkquest.org/12413/structures.htm
l
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Cytoskeleton

• Provides the cell's cytoplasm with structure and
  shape. There are 3 kinds

• Filaments
• Microfilaments
• microtubules

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Cytoplasm

• Gel-like mixture
• Surrounded by cell membrane

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Cell Membrane

• Controls movement of materials in and out of the
  cell
• Double layer

http//library.thinkquest.org/12413/structures.htm
l
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Now lets talk about structures only found in
PLANT Cells!!
Vacuoles Function stores water This is what
makes lettuce crisp When there is no water, the
plant wilts
Chloroplasts Function traps energy from the sun
to produce food for the plant cell. Green in
color because of chlorophyll, which is a green
pigment
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Cell Walls

• provides the cell with structural support,
  protection, and acts as a filtering mechanism.

28
Put your skills to the test!

• http//www.cellsalive.com/cells/cell_model.htm
• http//www.execulink.com/ekimmel/drag_gr11/organe
  ll.htm

29
A biology student observed the cellsshown below
under a microscope.
These cells most likely came from A. an
animal. B. an archaebacterium. C. a fungus. D. a
plant.
30
Gizmo

• http//www.explorelearning.com/index.cfm?methodcR
  esource.dspDetailResourceID450