Thank you for the opportunity to help you with your question!
Pinocytosis is one of the ways in which a cell feeds, specifically takes in fluids so its also referred to as "cell drinking". A cell knows when to performs pinocytosis through cell specific triggers mediated by receptors as transmitted through from changes in adjacent extracellular fluid composition. Depending with location of the cell, some perform pinocytosis more often than others, for instance cells in the microvilli of the intestines perform a lot pinocytosis because they are exposed to a changing extracellular fluid. However pinocytosis is non specific and requires a lot of energy, that is ATP molecules.
Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 1st, 2015
Hello Blackcatbc. I am typing a more elaborate answer. Incase you got any specific question on this. please feel free to ask
Sep 1st, 2015
Pinocytosis is a way of hydrating the cell. The trigger is brought by biochemical changes in the cell itself or the adjacent extracellular fluid, such as changes in pH, electrolyte balance or osmolarity. Pinocytosis is therefore used to achieve some physiological balance in the cell or the extracellular fluid. Its not a common cell feeding process since it requires a lot of energy use is not specific to substances it takes in
No its not the same concept. While pinocytosis is involved in intake of fluids, phagocytosis takes in solid particles. It occurs in specialized cells called phagocytes, which include macrophages, neutrophils, and other white blood cells. However both are forms of endocytosis-process in which a cell takes in substances.