PATHOLOGY

PATHOLOGY MCQ

IMMUNE RESPONSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the first immune cell to respond to a foreign invader?
A
B Cells
B
Lymphocytes
C
Phagocytes/Macrophages
D
T Cells
Explanation: 

Detailed explanation-1: -Dendritic cells initiate adaptive immune responses. Immature dendritic cells resident in infected tissues take up pathogens and their antigens by macropinocytosis and receptor-mediated phagocytosis.

Detailed explanation-2: -Neutrophils are typically the first cells to arrive at the site of an infection because there are so many of them in circulation at any given time.

Detailed explanation-3: -The innate immune system: Fast and general effectiveness The innate immune system is the body’s first line of defense against germs entering the body. It responds in the same way to all germs and foreign substances, which is why it is sometimes referred to as the “nonspecific” immune system.

Detailed explanation-4: -White blood cells They are made in your bone marrow and are part of the lymphatic system. White blood cells move through blood and tissue throughout your body, looking for foreign invaders (microbes) such as bacteria, viruses, parasites and fungi. When they find them, they launch an immune attack.

Detailed explanation-5: -When a pathogen invades, tissue resident macrophages are among the first cells to respond. Two of the main roles of the tissue resident macrophages are to phagocytose incoming antigen and to secrete proinflammatory cytokines that induce inflammation and recruit other immune cells to the site.

There is 1 question to complete.