Final answer:
The statement that 'Pinocytosis is used to take in water' is true; pinocytosis is a form of endocytosis, also known as 'cell drinking,' and allows for the absorption of extracellular water and solutes.
Step-by-step explanation:
Regarding the student's inquiry, the statement 'Pinocytosis is used to take in water' is true. Pinocytosis is a form of endocytosis sometimes referred to as "cell drinking". This biological process was discovered by Warren Lewis in 1929 and involves the cell membrane invaginating to surround a small volume of extracellular fluid, which includes water, and then pinching off to form a vesicle. Contrary to exocytosis, which is concerned with the expulsion of substances out of cells, pinocytosis is indeed used for the absorption of extracellular water along with other dissolved solutes. Small vesicles are formed constantly through this process, and they do not necessarily need to merge with lysosomes.