When cells such as white blood cells of a vertebrate engulf bacteria,the membrane transport mechanism used is
A)receptor-mediated endocytosis.
B)active transport.
C)passive transport.
D)phagocytosis.
E)exocytosis.

Question

Quizplus · Accepted Answer

The process of engulfing bacteria by white blood cells is called phagocytosis. It involves the formation of pseudopodia, which surrounds the bacteria and brings it inside the cell in a phagosome. This is not a membrane transport mechanism per se, but rather a form of cell eating that uses the cell's membrane to surround the target. Therefore, the correct choice is D, phagocytosis. Receptor-mediated endocytosis is a type of active transport used by cells to regulate the internalization of specific molecules, while passive transport involves the movement of substances across membranes without the requirement of energy. Exocytosis refers to the process by which cells secrete molecules out of the cell through the fusion of vesicles with the plasma membrane. Active transport involves the movement of molecules against their concentration gradient, and it requires energy in the form of ATP.

When Cells Such as White Blood Cells of a Vertebrate