Question 1

Which of the following is NOT a distinctive attribute of adaptive immunity?

Accepted Answer

It is present from birth and provides immediate protection.

Question 2

Which cell type is primarily responsible for humoral immunity?

Accepted Answer

B lymphocytes

Question 3

Which of the following best describes the flow of lymph in the human body?

Accepted Answer

Lymph flows from peripheral tissues toward the heart, passing through lymph nodes.

Question 4

Which organ is considered a primary lymphoid organ?

Accepted Answer

Bone marrow

Question 5

Which of the following characteristics is most likely to make an antigen highly immunogenic?

Accepted Answer

High molecular weight and complex structure

Question 6

A patient receives a vaccine and later develops immunity. This is an example of:

Accepted Answer

Artificially acquired active immunity

Question 7

Which immunoglobulin class is most abundant in serum and provides the majority of antibody-based immunity?

Accepted Answer

IgG

Question 8

Which process describes the elimination of self-reactive lymphocytes during development?

Accepted Answer

Clonal deletion

Question 9

Which of the following is a function of MHC class II proteins?

Accepted Answer

Present exogenous antigens to helper T cells

Question 10

Which cell type is exceptionally proficient at presenting antigens to T cells?

Accepted Answer

Dendritic cells

Question 11

Which equation best represents the structure of an immunoglobulin molecule?

Accepted Answer

$$Ig = 2H + 2L$$

Question 12

A patient is exposed to hepatitis B virus and receives hepatitis B immunoglobulin (antibody) therapy. This is an example of:

Accepted Answer

Artificially acquired passive immunity

Question 13

Which of the following best describes the role of cytotoxic T cells?

Accepted Answer

They directly kill infected or abnormal cells.

Question 14

Which cytokine is most commonly associated with the activation of T cells?

Accepted Answer

Interleukin-2 (IL-2)

Question 15

Which of the following is TRUE regarding endogenous antigen processing?

Accepted Answer

Antigens are processed and presented on MHC class I molecules.

Question 16

Which of the following best describes the difference between cell-mediated and humoral immunity?

Accepted Answer

Cell-mediated immunity involves T cells targeting infected cells, while humoral immunity involves antibodies neutralizing pathogens.

Question 17

Which equation represents the calculation of the affinity constant ($$K_a) $$for antigen-antibody binding?

Accepted Answer

$$K_a = \frac{[Ag-Ab]}{[Ag][Ab]}$$

Question 18

Which of the following is a key function of memory T cells?

Accepted Answer

They rapidly respond to previously encountered antigens.

Question 19

Which process is essential for the diversity of antibodies produced by B cells?

Accepted Answer

Somatic recombination of immunoglobulin gene segments

Question 20

A patient who recovers from chickenpox develops immunity to future infections. This is an example of:

Accepted Answer

Naturally acquired active immunity

Chapter 16 study guide

Guida di studio - Domande di pratica