I'll karyote on homeostasis and organization further

Cell organization v. homeostasis

-cell homeostasis is where there is appropriate internal environment. The plasma membrane forms a cytoplasmic compartment, which maintains homeostasis by allowing cells to exchange materials with their environment. Organelles are internal structures which carry out specific functions which are often highly complex.

Electron microscopes have superior resolving power, which is often helpful in understanding the anatomy of cells.

Prokaryotes - have plasma membrane, little internal organization, usually cell wall, ribosomes, may have a propeller like flagella.

Eukaryotes- membrane enclosed nucleus, and a variety of organelles.

Three key functions of cell membranes :

• divide cells into compartments with specialized activities, in small areas of cytoplasm
• energy storage and conversion (electron transport chains, concentration gradients)
• concentration of molecules

Peroxisomes- enzymes produce and degrade hydrogen peroxide, helpful in lipid metabolism and deterioration of harmful compounds.

Proteins- hugely important in cell membranes.