Transcript Cell Organelles

Eukaryotic Cells
Plasma Membrane
(Cell Membrane)
• Outer boundary of cell
• Protects the cell
• Controls what enters
and leaves the cell
Maintains Homeostasis
“steady state”
Plasma Membrane
• Phospholipid
bilayer (nonpolar)
• Membrane proteins
– act as transport
channels
• Carbohydrate
chains –act as “ID”
tags for the cell
• Cholesterol –
provides stability
for the membrane
Cell Wall
• Only found in plant
cells
• Adds protection and
support
• Made of cellulose.
• Allows water and
dissolved substances
to pass through.
The Nucleus
• Controls most
activities in the cell
• Contains all genetic
information in the
form of DNA.
Cytoplasm
• Clear fluid within cell
that contains all
organelles
• Moves materials
throughout the cell
Endoplasmic Reticulum
• Series of folded
membranes that form
sacs or tubes
• Rough ER has
ribosomes attached
Ribosomes
• Transports materials
between the cytoplasm
and nucleus
• Makes proteins in the cell
• May be free in cytoplasm
or attached to ER
• Proteins are vital to lifeall cells must produce
them
Golgi Bodies
• Saclike membranes
used for storing/
packaging of
chemicals
• Cells that make saliva
or mucus have many
Golgi bodies
Mitochondria
• Energy producers
• Powerhouse of the cell
• Sausage-shaped
• Has its own DNA
• Many mitochondria in
muscle cells
Plastids
• Only found in plants/
algae
• Contain food or
pigments
• Leucoplasts store food
• Chloroplasts contain
the pigment
chlorophyll
Vacuoles
• Store food, water, or
waste materials
• Plant cells have large
vacuoles
Lysosomes
• Found in Golgi bodies
• Contain digestive
enzymes to digest
unwanted particles
• Help white blood cells
to destroy bacteria