5.2 Phagocytosis Flashcards
What is Phagocytosis?
Large particles can be engulfed by cells in the vesicles form from the cell-surface membrane.
What cells in the blood carry out phagocytosis and known as phagocytes?
White blood cells.
What do phagocytes do?
Provide an important defence against pathogens that get into the body.
What is Stage One of phagocytosis?
The phagocyte is attracted to the pathogen by chemical products of the pathogen. Moves along the concentration gradient.
What is Stage Two?
The phagocyte has several receptors on its cell-surface membrane that attaches to the pathogen.
What is Stage Three?
Lysosomes within the phagocyte migrate towards the phagosome formed by engulfing the bacterium.
What is Stage Four?
Lysosomes release lysozymes into the phagosome.
What is Stage Five?
The hydrolysis products of the bacterium are absorbed by the phagocyte.
