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Question: 1 what is one difference between an exotoxin and an...

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1) What is one difference between an exotoxin and an endotoxin?

A Exotoxins are given out for free at the gate of county fairs, but endotoxins must be purchased.
B Exotoxins are produced and released by bacteria, whereas endotoxins are products of viral infection.
C Exotoxins are not essential to the survival of bacteria, but endotoxins are.
D Exotoxins can be neutralized by antibody, but defeat of endotoxins requires T cells.

2) The two main cell lineages that arise from bone marrow stem cells to produce immune cells are...

A The erythrocytic and myelocytic lineages
B The myelocytic and fibrocytic lineages.
C The myelocytic and lymphocytic lineages.
D The lymphocytic and erythrocytic lineages.

3) What is the leukocyte found in largest numbers in blood?

A Mast cells
B Neutrophils
C B cells
D Plasmacytoid dendritic cells

4) What is the difference between plasma and serum?

A Plasma and serum are the same.
B Plasma is the fluid phase of whole blood before clotting, and serum is after clotting.
C Serum is the cellular fraction of whole blood, and plasma is the fluid fraction.
D Plasma is worth money at a blood bank, but serum is not.

5) What is an example of a soluble defensive factor produced by the immune system?

A T cells.
B B cells.
C NK cells.
D Antibodies.

6) Which one of the following cells is most capable of killing your own cells if they become infected with a virus?

A Dendritic cells
B B cells
C Natural killer cells
D Basophils

7) How can your immune system be trained to protect you against a pathogen that you have
never been infected with?

A Inspirational videos.
B By infection with that pathogen.
C Drinking lots of coffee and wheat grass.
D Vaccination.

8) Why are innate immune responses faster than adaptive responses?

A Because innate cells are already fully developed whereas adaptive cells must undergo a differentiation process before they can participate in defending against a pathogen.
B Because soluble innate defensive factors are already present in your blood and interstitial fluids whereas soluble adaptive factors can only be produced after infection (or vaccination).
C The number of innate cells capable of recognizing and responding to an infection is much larger at any given moment than the number of similarly capable adaptive cells.
D All are correct
None are correct

9)Which one of the following is not a sentinel cell?

A Mast cell
B Monocyte
C Macrophage
D Dendritic cell

10) Which one of the following is an innate cell that is capable of producing antibody?

B Gamma-delta T cell
C B-1 cell
D B-2 cell
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