Question 1

Identify the four classes of pathogens that provoke immune responses in our bodies and give an example of each.

Accepted Answer

The answer of Identify the four classes of pathogens that...

Question 2

Which of the following pairs is mismatched?

Accepted Answer

A) innate immunity: highly specialized defenses 
B) secondary immune response: immunological memory 
C) hematopoiesis: bone marrow 
D) phagocytosis: uptake and killing of microbes 
E) lymphocyte recirculation: continuous transport between blood and lymph.

Question 3

Which of the following are characteristics of innate immunity:

Accepted Answer

A) inflammation 
B) improvement in recognition of the pathogen during the response 
C) fast response 
D) highly specific for a particular pathogen 
E) cytokine production.

Question 4

What are the main differences between innate immunity and adaptive immunity?

Accepted Answer

The answer of What are the main differences between innate...

Question 5

A term generally used to describe all white blood cells is _____.

Accepted Answer

A) hematopoietic cells 
B) myeloid progenitor 
C) dendritic cells 
D) monocytes 
E) leukocytes.

Question 6

Vaccination is best described as prevention of severe disease by _______.

Accepted Answer

A) the deliberate introduction of a virulent strain of an infectious agent 
B) prior exposure to an infectious agent in an attenuated or weakened form 
C) prophylactic treatment with antibiotics 
D) stimulating effective innate immune responses 
E) using effective public-health isolation regimens such as quarantine.

Question 7

A. Name the parts of the body where epithelia act as barriers to infection.
B. Describe the three main ways in which epithelia carry out this barrier function, giving details of the mechanisms employed.

Accepted Answer

The answer of A. Name the parts of the body...

Question 8

Which of the following pairs of associations is mismatched?

Accepted Answer

A) large granular lymphocyte: T cell 
B) megakaryocyte: platelet 
C) B cell: plasma cell 
D) monocyte: macrophage 
E) myeloid progenitor: neutrophil.

Exam 1: Elements of the Immune System and Their Roles in Defense