Transcript 7.3 pp notes II

Cell parts outline
1. Plasma membrane
2. Cell wall
3. Nucleus
chromatin
4. Nucleolus
5. Ribosome
6. Nuclear envelope
7. Cytoplasm
8. ER
two types
9.
10.
11.
12.
13.
14.
Golgi apparatus
Vacuole
Lysosome
Chloroplast
Mitochondria
Cytoskeleton
microfilament, microtubule
15. Centriole
16. Cilia
17. flagella
Biology
Section 7.3
All cells contain organelles BUT not all
organelles are surrounded by membranes
Prokaryotes –
do not contain
any organelles
with
membranes
Most of these are
unicellular (one celled)
like bacteria
Eukaryotic cells –
contain membranebound organelles
Most of these are
multicellular
(many celled)
Because organelles have distinct
compartments, chemical
reactions can be carried out at
the same time in different
organelles.
Eukaryotic cells
are generally
100x larger than
prokaryotic cells.
Cells
Prokaryote vs. eukaryote
• Both have cytoplasm, ribosomes, cell
membrane, DNA
• Prokaryotes 10-100X smaller
• Prokaryotes DNA in circular chromosome
in nucleoid region, eukaryotes DNA in
linear chromosome in nucleus
• Prokaryotes= no membrane bound
organelles (ex. Nucleus), Eukaryotes have
membrane bound organelles
Boundary of cell,
allows materials to
cross
Additional support and
protection to plant cells,
Outside cell membrane
manages cell, contains
DNA
jumbled strands of DNA
Chromatin
In nucleus
Makes ribosomes,
inside nucleus
Ribosomes
Makes proteins
Surrounds nucleus
Clear, gel-like fluid
inside a cell, chemical
reactions
Folded membranes,
transports materials
through out cell
Rough ER
Ribosomes attached,
makes proteins
Smooth ER
No ribosomes
attached, makes lipids
(detoxification)
Flattened stack of
membranes, Sorts and
packages
Storage for food, water,
enzymes, and waste
Digestion
(old organelles, food
particles, viruses or
bacteria)
Ever wondered how a tadpole gets rid of
its tail and grows legs??
Lysosomes digest the cells in the tail, and
these molecules are released to build
different cells, like legs!
Trap light for
photosynthesis, plant
cells only!
Powerhouse, makes
energy
Ex. Muscle cells
have lots of these
Framework of cell
microfilaments: Solid (ex.
Cytoplasmic streaming)
microtubules: hollow
(ex. Cilia, flagella)
Helps cell division
of animal cells
Short hairs for
movement
Long tail for
movement
CellsTissuesOrgansOrgan systemsOrganisms
Review questions
• What 2 cell parts are found in plant but not
animal cells?
• Which organelle is found in animal cells
only?