Take this Quiz: A-Level Biology: The Immune System | Zestly

Question 1

Which specific mechanism allows phagocytes to identify pathogens for engulfment during the innate immune response?

Accepted Answer

The binding of receptors on the phagocyte to pathogen-associated molecular patterns (PAMPs)

Question 2

Which of the following statements correctly describe the role of T helper cells in the immune response?

Accepted Answer

They release cytokines to stimulate B cell proliferation.

Question 3

During the humoral response, what is the primary function of the clonal selection process?

Accepted Answer

To identify and proliferate the specific B cell clone complementary to a specific antigen.

Question 4

Why does the secondary immune response occur much faster and produce higher antibody concentrations than the primary response?

Answer

Because the pathogen is weaker during the second exposure.

Answer

Because memory B cells can rapidly differentiate into plasma cells upon re-exposure.

Answer

Because the body has a higher baseline level of circulating antibodies.

Answer

Because T cells are no longer required for the secondary response.

Question 5

Which of the following are examples of passive immunity?

Answer

Antibodies passed from mother to fetus across the placenta.

Answer

Immunity acquired after receiving a live-attenuated vaccine.

Answer

Injection of anti-venom containing pre-formed antibodies.

Answer

Immunity developed after recovering from a viral infection.