Unit 4 Bio Cell Organelles/Structures

Cell Membrane ( Plasma Membrane)

Outer boundary of cell; separates cell from external environment; regulates what goes in or out of cell

Cytosol (cytoplasm)

clear fluid filling cell in which organelles are suspended

Nucleus

contains the genetic material; controls the activities of the cell; surrounded by nuclear membrane

Nucleolus

found within nucleus, which ribosomes are made

Ribosomes (free floating vs. attached to ER)

Location where proteins are assembled; most numerous organelle

Golgi Apparatus

Packaging & Processing organelle; proteins modified and prepped for export

Mitochondria

“powerhouse” of the cell; location where ATP is made by aerobic respiration

Lysosome

Contains digestive enzymes, break down foods and worn out cell parts

Peroxisome

Small, membrane bound, contain toxic peroxides that are safely broken down

Cytoskeleton ( microtubules and microfilaments)

Provides shape and support for the cell

Vacuole

Storage organelles; stores waste and materials

Centrioles

aids in cell division

Cell Walls

found outside cell membrane; made of cellulose; provides support

Chloroplasts(Plastid)

contain chlorophyll; site of photosynthesis.

Chromoplasts(Plastid)

contain accessory pigments that aid in photosynthesis

Leucoplasts

store starch