Topic 6 Microbiology and pathogens

Question 1

antigens and antibodies

Question 1

B lymphocytes and humoral immunity

Question 2

T lymphocytes and cell-mediated immunity

Question 3

Active and passive immunity

Question 4

Neutrophils, Macrophages and Phagocytosis

Answer 4

In your blood, there are white blood cells and red blood cells.
the white blood cells can be separated into two groups.
the first category is phagocytes (macrophages and neutrophils-)
-non specific defences

lymphocytes (B lymphocytes and T lymphocytes) specific immune system.
bacterial cells are covered in chemicals called opsonin. By sticking to the pathogen, opsonins tag pathogens as foreign. Opsonins include antibodies as well as other molecules which are called complement. opsonins attach to foreign molecules and tag then as foreign.

Question 5

phagocytes

Answer 5

phagocytes such as neutrophils are attracted to molecules produced by pathogens. receptors on the phagocyte membrane now attach to opsonins and the