Explain pinocytosis with label diagrams
Answers
Answer:
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Explanation:
In cellular biology, pinocytosis, otherwise known as fluid endocytosis and bulk-phase pinocytosis, is a mode of endocytosis in which small particles suspended in extracellular fluid are brought into the cell through an invagination of the cell membrane, resulting in a suspension of the particles within a small vesicle inside the cell.
These pinocytotic vesicles subsequently fuse with endosomes to hydrolyze (break down) the particles. This process requires energy carried by adenosine triphosphate (ATP), a chemical compound mostly used as a carrier of energy in the majority of animal cells.
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Explanation:
In humans, this process occurs 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. The invaginated pinocytosis vesicles are much smaller than those generated by phagocytosis. The vesicles eventually fuse with the lysosome whereupon the vesicle contents are digested. Pinocytosis involves a considerable investment of cellular energy in the form of ATP.
