Which form of endocytosis is nonspecific, in that it occurs by the formation of an invagination of the plasma membrane, which then fills with interstitial fluid of the immediate area?
A) active transport
B) hyperosmotic vesicular entrapment
C) phagocytosis
D) pinocytosis
E) hydrosmosis

Question

Quizplus · Accepted Answer

Pinocytosis is the nonspecific form of endocytosis where the cell takes in interstitial fluid along with any solutes that happen to be present in the fluid. This occurs by the formation of an invagination or pocket on the plasma membrane that then fills with fluid and is taken into the cell as a vesicle. Active transport is different from endocytosis as it involves the movement of molecules across the membrane against a concentration gradient with the use of energy. Hyperosmotic vesicular entrapment, hydrosmosis, and phagocytosis are not the correct terms to describe this process of nonspecific endocytosis.

Which Form of Endocytosis Is Nonspecific, in That It Occurs