Do Now
• Brainstorm: Where
does life come from?
The Cell Theory
• All living things are made up of cells
• Cells only arise from pre-existing
cells.
• The cell is the basic unit of life.
Robert Hooke
• Was the first to
use the term cell.
• Looked at cork
cells under the
compound
microscope.
Prokaryote
• Have no formed
nucleus
• Are unicellular
• Are very
disorganized.
• Do not have
membrane bound
organelles.
• Bacteria are
prokaryotes
Eukaryote
• Have a Nucleus
• Have membrane
bound organelles
• Are very organized.
• Can be uni/ or
multicellular.
• Ex.- animal, plant
cells.
The Cell Membrane
• Controls
movements into
and out of the cell
• Is semi-permeable,
or selectively
permeable.
• Is made of a
phospho-lipid bilayer.
• Helps maintain the
shape of the cell.
Cytoplasm
• Jelly-like
material which
contains
materials
involved in cell
metabolism.
• Gives the cell its
shape
The Nucleus and The Nucleolus
• Serves as the
control center of
the cell and
contains DNA.
• NucleolusContains RNA
• Nuclear membrane
– Control what
goes in or out of the
Nucleus.
Chromosomes
• Contains code
that guides all
cell activities
• They are found in
the nucleus.
• Chromosomes
contain the genes
that determine an
organisms
charateristics.
Endoplasmic Reticulum
•Transports
materials
throughout the
cell.
•Rough ER
contains
Ribosomes.
•Smooth ER has
no Ribosomes
Ribosomes
• Sites of
protein
synthesis
Golgi Bodies
• Packages and
secretes the
proteins made by
the Ribosomes.
• Look like stacks
of pancakes.
Mitochondria
• Power House of
The Cell.
• Makes ATP
The Centrioles
• Involved in cell
division
• Produce
Microtubules that
pull chromosomes
apart.
• Microtubules also
give the cell
structure.
• Are found inside
the nucleus.
Lysosomes
• Powerful
chemicals that
break things
down.
Vacuoles
• Plays a role in
intercellular
digestion
• Store food and
water.
• Are much larger
in plant cells.