Question

what occurs during pinocytosis? select an answer a. a vesicle containing whatever molecules are in solution outside the cell bulges inward, pinches off, and enters the cell. b. a transport vesicle inside the cell approaches the plasma membrane of the cell, fuses with it, and releases its contents to the outside of the cell. c. a cell ingests a large particle, such as a bacterial cell. d. receptor proteins embedded in the membrane recognize specific substances inside the cell, surround them, and then release the contents to the outside of the cell.

Explanation:

Pinocytosis is a form of endocytosis where the cell takes in extracellular fluid and dissolved molecules. A vesicle forms by the inward - bulging of the plasma membrane, pinches off, and enters the cell. Option B describes exocytosis, option C describes phagocytosis, and option D is an incorrect description of a process related to membrane receptors.

Answer:

A. A vesicle containing whatever molecules are in solution outside the cell bulges inward, pinches off, and enters the cell.