AP BIOLOGY

Detailed explanation-1: -In humans, this process occurs in cells lining the small intestine and is used primarily for absorption of fat droplets. In endocytosis the cell plasma membrane extends and folds around desired extracellular material, forming a pouch that pinches off creating an internalized vesicle (Fig.

Detailed explanation-2: -Cells ingest fluid, molecules, and particles by endocytosis, in which localized regions of the plasma membrane invaginate and pinch off to form endocytic vesicles. Many of the endocytosed molecules and particles end up in lysosomes, where they are degraded.

Detailed explanation-3: -Once a cell has successfully engulfed a target particle, the pocket containing the particle will pinch off from the membrane, forming a membrane-bound compartment called a food vacuole. The food vacuole will later fuse with an organelle called a lysosome, the “recycling center” of the cell.

Detailed explanation-4: -Once secretory vesicles are loaded with their cargo, they pinch off from the TGN and are actively transported to the specific subcellular site, where they fuse with the plasma membrane and release their cargoes. These sites may be quite far from the site of packaging and processing in the Golgi complex.

Detailed explanation-5: -Tiny pockets form along the cell membrane, fill with liquid, and pinch off to form vacuoles within the cell. This process is known as pinocytosis.