3.2 PPT_Organelles

Download Report

Transcript 3.2 PPT_Organelles

Do Now
Study #2 for quiz on Pro vs. Euk Cells
Two Main Types of
Eukaryotic Cells
Plant Cell
Animal Cell
Organelles
Organelles
• Very small (Microscopic)
• Perform various functions for a
cell
• Found in the cytoplasm
• May or may not be membranebound
Animal Cell Organelles
Nucleolus
Nucleus
Nuclear envelope
Rough
endoplasmic
reticulum
Golgi apparatus
Ribosome (attached)
Ribosome (free)
Cell Membrane
Mitochondrion
Smooth
endoplasmic
reticulum
Centrioles
5
Plant Cell Organelles
6
Cell or Plasma Membrane
WHAT it is:
•
•
Controls what enters or leaves the cell
Composed of double layer of phosphoLIPIDS and proteins
Its FOUND in:
•
ALL CELLS
FACTORY:
•
•
Security Guard
Gate around the Factory
Outside
of cell
Proteins
Carbohydrate
chains
Cell
membrane
Inside
of cell
Protein
channel
Lipid bilayer
7
Phospholipids
• Tails = HATE water
• Heads = LOVE water
• Hydrophillic Heads contain Glycerol &
Phosphate (WATER LOVING)
• Hydrophobic Tails are made of fatty
acids (WATER FEARING)
• Make up a bilayer where tails point
inward toward each other
8
The Cell Membrane is Fluid
Molecules in cell membranes are constantly moving
and changing
copyright cmassengale
9
Cell Wall
FUNCTION:
• Supports and protects cell
• Found outside of the cell
membrane
• Made of Cellulose
FOUND In:
• PLANTS ONLY
FACTORY:
• BRICK WALL protecting to
outside of the whole
factory
10
CELL WALL
Cytoplasm of a Cell
FUNCTION:
• Watery, jelly like
environment that contains all
the organelles
cytoplasm
FOUND IN:
• ALL CELLS
FACTORY:
• The FLOOR of the factory
OR
• Like the AIR in the factory
12
NUCLEUS
FUNTION:
• Controls the normal
activities of the cell
• Contains the DNA in
chromosomes
FOUND IN:
• ALL CELLS
FACTORY:
• The BOSS of the factory
13
NUCLEUS
14
Inside the Nucleus The genetic material (DNA) is found
DNA is spread out
And appears as
CHROMATIN
in non-dividing cells
DNA is condensed &
wrapped around proteins
forming
as CHROMOSOMES
in dividing cells
15
What Does DNA do?
DNA is the hereditary
material of the cell
Genes that make up the DNA
molecule code for different
proteins
16
Mitochondria
FUNCTION:
• “Powerhouse” of the cell
• Generate cellular energy (ATP)
• Site of CELLULAR
RESPIRATION (breaks down
glucose to give the cell energy)
FOUND IN:
• ALL CELLS
FACTORY:
• POWERPLANT of the factory
• The FURNACE burning coal for
energy
17
MITOCHONDRIA
IMPORTANT:
Folded shape increases
the surface area for
more reactions (= MORE
ATP CREATED)
18
MITOCHONDRIA
19
Chloroplasts
FUNCTION:
• Use energy from sunlight to
make own food (glucose) during
Photosynthesis
• Are green because of
CHLOROPHYLL
FOUND IN:
• PLANTS ONLY!
FACTORY:
• Solar energy panels
• Coal burned by furnace
(mitichondria) for energy
CHLOROPLAST
FUNCTION:
Ribosomes
• Makes PROTEINS!!!
•
•
•
“Protein factories” for cell
Join amino acids to make proteins (called protein synthesis)
Can be: free or attached (to the ER)
FOUND IN:
• ALL CELLS
FACTORY:
• The WORKERS

RIBOSOMES
23
Vacuoles
FUNCTION:
• Storage compartment in
cells
• Plant cells have a
LARGE Central Vacuole
• Small or absent in
animal cells
FOUND IN:
• Large vacuole in
PLANTS
FACTORY:
• Storage closet or
warehouse
VACUOLE
Endoplasmic Reticulum - ER
FUNTION:
• Transport chemicals between cells and within cells
• Provides large surface area for chemical reactions
to occur
• Two Kinds:
– Rough = has ribosomes
– Smooth = no ribosomes
FOUND IN:
• ALL CELLS
FACTORY:
• Assembly line of the factory
Endomembrane System
Includes nuclear membrane connected to ER connected
to cell membrane (transport)
copyright cmassengale
27
ENDOPLASMIC RETICULUM
28
Golgi Bodies
FUNCTION:
• Sort and packages the
products of the cell for
transport within and out of
the cell
• Looks like a stack of
pancakes!
FOUND IN:
• ALL CELLS
FACTORY:
• Postal Office
• Mail Room
GOLGI APPARATUS
30
Golgi Animation
Materials are transported from Rough ER
to Golgi to the cell
membrane
by
VESICLES
copyright cmassengale
31
Lysosomes
• FUNCTION:
• Digest and get rid of worn out cell
parts and invaders
• Do this with ENZYMES!
• FOUND IN:
• Mostly ANIMALS (some
plants)
• FACTORY:
• Janitors
• Wrecking ball
Centrioles
FUNTION:
• Help move chromosomes
(DNA) during cell
division
FOUND IN:
• ANIMALS ONLY!
FACTORY:
• Like CRANES used to
moves stuff around the
factory
33
Centrioles & the Mitotic Spindle
Made of MICROTUBULES (Tubulin)
copyright cmassengale
34
CENTRIOLES
35
Cilia & Flagella
• FUNCTION:
• Moving cells, in moving
fluids, or in small
particles across the cell
surface
• FOUND IN: all cells
• FACTORY:
• The maintenance trucks
that drive the workers
around the factory
Cell Movement with Cilia &
Flagella
Plant Cells vs. Animal Cells
Cell Wall
Chloroplasts
1 Large Vacuole
No Centrioles
Lysosomes are
rare
Centrioles
Lysosomes are
common
Several Small
Vacuoles
No Cell Wall
No Chloroplasts