cell part powerpoint
TRANSCRIPT
Living Environment
Mrs. Giacomin
Cell Structures and Functions
Cell Membrane• Outer membrane of a cell• Controls the transport of
materials into and out of the cell
• Double layered structure made of lipids, carbohydrates and proteins
• Semi-permeable (can select what molecules go in or out of a cell)
Nucleus• Controls all cell activities
• Called the “brain” of the cell
• Where chromosomes are located (DNA)
Nuclear MembraneOuter layer of the nucleus
Controls what passes into or out of the nucleus
NucleolusFound inside the nucleus
Where ribosomes are made
CytoplasmGel between the nucleus
and the cell membrane
Where cell organelles are located
Where most chemical reactions take place
Looks like Jell-O
MitochondriaInvolved in cellular
respiration
Where energy is released for the cell
Endoplasmic ReticulumSystem of channels or
canals that transport materials throughout the cell
Chemical reactions take place on the surface
Can have rough or smooth surface - rough surface is due to ribosomes
Golgi ApparatusA stack of membrane-
bounded channels and vacuoles
They synthesize (make), package and secrete cell products
RibosomesMake proteins from amino
acids
May be attached to the endoplasmic reticulum or may be in the cytoplasm
ChloroplastsInvolved in the
manufacture of food (photosynthesis)
Found only in plant cells
LysosomesMembrane-bounded sacs
Contain digestive enzymes
Involved in food digestion in one-celled animals
Destroy damaged or old cell parts in multi-cellular animals
VacuolesSac-like structures used
by the cell to store food, water and wastes
CentriolesFound in animal cells
Involved in cell division
Cell WallOuter layer of a plant cell
Supports and protects plant cells
Made up of cellulose (carbohydrate)