Nucleus, mitochondria, vesicle, lysosome

Description of nucleus

5um in diameter, contains chromosomes. Nucleolus is a dark staining area, RNA rich region.

Function of nucleus

Nucleolus manufactures ribosomes. Nuclear pores allow transport of molecules in and out of the nucleus

Describe the nuclear membrane

Nuclear membrane is seperated from cytoplasm by nuclear envelope, made of a double membrane with small holes. Small holes are nuclear pores (100nm)

Description of mitochondria

1um in diameter and 7um in length. Contains some DNA and RNA. Energy stores in high energy phosphate bonds of ATP

Function of mitochondria

Metabolic activity of a cell related to the number of cristae and mitochondria. Cells with a high metabolic activity have well developed mitochondria. Convert energy from breakdown of glucose into ATP. Aerobic respiration

Description and function of vesicle

Membrane stacks used for storage for transport

Storage for transport

Description of lysosome

0.05 to 0.5um. Releases hydrohytic enzymes. Separates enzymes from cytoplasm

Lysosome function

Performs intra cellular digestion- more numerous in cells performing phagocytosis. Limiting membrane keeps digestive enzymes separate from the cytoplasm