Phagocytosis

Question 1

What are the two types of white blood cells?

Answer 1

Phagocytes and Lymphocytes.

Question 2

What is the difference between phagocytes and lymphocytes?

Answer 2

Phagocytes ingest and destroy the pathogen by phagocytosis before it can cause harm, whereas lymphocytes are involved in immune responses.

Question 3

What is phagocytosis?

Answer 3

The process where large particles, such as some types of bacteria, are engulfed by cells in the vesicles formed from the cell-surface membrane.

Question 4

How are phagocytes transported around the body

Answer 4

Some phagocytes travel in the blood, but they are able to move out of the blood vessels, into other tissues.

Question 5

What is the process of phagocytosis?

Answer 5

• Phagocyte is attracted to pathogen by chemical products of pathogen, moving towards it along a concentration gradient.
• Phagocytes receptors on its cell surface membrane attach to chemicals on pathogens surface.
• Lysosomes within phagocyte migrate towards phagosome formed by engulfing the bacterium.
• Lysosomes release their lysozymes into the phagosome, where they hydrolyse the bacterium.
• The hydrolysis products of bacterium are absorbed by the phagocyte