The process that traps solids in the cell membrane and brings them into the cell is called:
pinocytosis
phagocytosis
ion pumps
I think it is phagocytosis because pinocytosis brings in fluid and dissolved substances. I'm not sure if I'm right
You are on the right track! The process that you are referring to, which traps solids and brings them into the cell, is indeed called phagocytosis.
To differentiate between pinocytosis and phagocytosis, let me explain both processes:
1. Pinocytosis is a form of endocytosis where the cell membrane surrounds and engulfs fluid and small dissolved substances from the extracellular environment. The resulting vesicles formed during pinocytosis are much smaller compared to those formed during phagocytosis.
2. Phagocytosis, on the other hand, is a similar process to pinocytosis but involves the engulfment of larger solid particles like bacteria, cell debris, or other foreign substances. The cell membrane extends and surrounds the particle, forming a larger vesicle called a phagosome, which is then transported into the cell.
In the context of your question, since you are referring to the trapping of solids, phagocytosis is the correct answer.