Structures of the Cell

Fluid mosaic lipid bilayer; protects cell, mediates entry and exit of cells (selectively permeable), cell communication

contains cytosol and organelles; site of intracellular activities

Intracellular fluid

Skeleton of cell made of microfilaments, intermediate filaments, and microtubules; maintains shape and movement of cell

Specialized structures with specific shapes and functions within the cell

Pair of centrioles; organizes mictrotubules and spindles for cell division

Hair-like projections on a cell; move fluids over cell's surface

A single tail-like projection; moves entire cell

Composed of two subunits in cytosol OR attached to rough ER; protein synthesis

Membranous network of flattened sacs or tubules;
Rough ER: covered with ribosomes, makes proteins that will be secreted or sent to cell membrane
Smooth ER: lacks ribosomes, makes lipids, helps detoxify harmful susbstances, stores calcium

Flattened membranous sacs; sorts and packages susbstances for transport to their destinations

Vesicle; contains digestive enzymes that break down organelles, entire cells, and other cellular materials

Vesicles; breaks down toxic and organic substances within the cell

Barrel-shaped structures containing proteases; breaks down unneeded or damaged proteins by cutting them into small peptides

Site of aerobic cellular respiration reactions that produce most of a cell's ATP,
role in apoptosis (cell suicide)

Acts a control center, pores regulate what enter and leaves, nucleoli makes ribosomes, and chromosomes hold genes that guide cell structure and function