Micro Revision 2

Question 1

It is observed that a cytokine released from NK cells is a potent stimulator of macrophages. Which of the following substances is most likely elaborated by NK cells to stimulate macrophages?
• CD8 surface markers
• Interferon gamma
• N-formyl methionyl receptor • Nitric oxide synthetese
• Surface immunoglobulin

Answer 1

• Interferon gamma

Question 2

As part of the innate immune response, which cells participate in phagocytosis?
• Macrophages and NK cells
• Macrophages and plasma cells, • NK cells and neutrophils
• Macrophages and neutrophils
• T cells and mast cells

Answer 2

Macrophages and neutrophils

Question 3

Which of the following is not characteristic for innate lymphocyte cells?

• They are lymphocyte-like cells
• They produce cytokines
• They express T cell antigen receptors
• They provide early defense against infections • They are stimulated by cytokines

Answer 3

They express T cell antigen receptors

Question 4

T cells interact with

Answer 4

other cells and not with soluble antigens,

Question 5

T cell antigen receptors are designed to see

Answer 5

displayed by cell surface molecules

Question 6

The specialized cells that capture and display antigens and activate T lymphocytes are called

Answer 6

antigen presenting cells (APCs

Question 7

used to refer to specialized cells that display antigens to CD4+ T lymphocytes

Answer 7

APC

Question 8

all nucleated cells can display protein antigens to

Answer 8

CD8+ T lymphocytes,

Question 9

The displaying host cell–associated antigens for recognition by CD4+ and CD8+ T cells is performed by specialized proteins called

Answer 9

major histocompatibility complex (MHC) molecules

Question 10

most effective APCs for activating naive T cells

Answer 10

Dendritic cells

Question 11

Macrophages and B lymphocytes also function as APCs for

Answer 11

previously activated CD4+ helper T

Effector T cells

Question 12

Dendritic cells, macrophages, and B lymphocytes express

Answer 12

class II MHC molecules

Question 13

What happens after naive T cells are activated by dendritic cells

Answer 13

Differentiation into effector cells

Question 14

What type of immunity occurs when macrophages initiate effector T cells by introducing a microbe

Answer 14

Cells mediated immunity

Question 15

What type of immunity occurs when B cells initiate effector T cells by introducing a microbe

Answer 15

Humoral immunity

Question 16

Dendritic cells that are resident in epithelia and tissues capture protein antigens and transport the antigens to

Answer 16

draining lymph nodes

Question 17

Resting tissue-resident dendritic express membrane receptors, such

Answer 17

C- type lectins, that bind microbes

Question 18

Dendritic cells use receptors to capture and endocytose microbes or microbial products and then process the ingested proteins into

Answer 18

peptides capable of binding to MHC molecules

Question 19

The dendritic cells are activated

Answer 19

cytokines, such as tumor necrosis factor (TNF), produced in response to the microbes
Microbal antigen binding