AP BIOLOGY

Detailed explanation-1: -The routes that lead inward from the cell surface to lysosomes start with the process of endocytosis, by which cells take up macromolecules, particulate substances, and, in specialized cases, even other cells.

Detailed explanation-2: -Endocytosis is the process of taking material into the cell by means of infoldings, or pockets, of the cell membrane. The pocket that results breaks loose from the outer portion of the cell membrane and forms a vacuole within the cytoplasm.

Detailed explanation-3: -The term “endocytosis” was coined by Christian deDuve in 1963 to include both the ingestion of large particles (such as bacteria) and the uptake of fluids or macromolecules in small vesicles. The former of these activities is known as phagocytosis (cell eating) and the latter as pinocytosis (cell drinking).

Detailed explanation-4: -Endocytosis is a general term describing a process by which cells absorb external material by engulfing it with the cell membrane. Endocytosis is usually subdivided into pinocytosis and phagocytosis.

Detailed explanation-5: -Endocytosis is a process that takes materials into a cell through infoldings or pockets in the cell membrane. Endocytosis involves the formation of a vesicle as the cell membrane invaginates and “pinches off” into the cytoplasm.