|
Living Environment Regents June 2008 Question 23 |
 |
 |
 |
|
Thursday, 23 April 2009 06:35 |
Cell A is engulfing the disease causing organism (Phagocytosis or cell eating)
Phagocytosis is a form of endocytosis. In the process of phagocytosis the cell changes shape by sending out projections which are called pseudpodia (false feet). The phagocytic cell such as a macrophage may be attracted to a particle like a bacteria or virus by chemical attractant. This process is called chemotaxis (movement toward a source of chemical attractant). The phagocytic cell sends out membrane projections that make contact with some particle.Some sort of receptor ligand interaction occurs between the phagocytic cell surface and the particle that will be ingested. The pseudopodia then surround the particle and when the plasma membrane of the projection meet membrane fusion occurs. This results in the formation of an intracellular vesicle.
Correct Answer: Option 3
|
|
Last Updated on Monday, 30 November 2009 15:56 |
