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Campbell Biology Chapter 43 Exam | The Immune System Questions & Answers | General Biology 2026/2027

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Campbell Biology Chapter 43 exam preparation covering the immune system, innate and adaptive immunity, antigens, antibodies, B cells, T cells, MHC molecules, immune responses, and pathogen defense with practice questions and answers for undergraduate General Biology students.

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Campbell Biology Chapter 43 Exam
A fruit fly, internally infected by a potentially D
pathogenic fungus, is protected by
A) its plasma cells.
B) its immunoglobulins.
C) its antibodies.
D) its antimicrobial peptides.
E) its B cells.




Engulfing-phagocytic cells of innate immunity include D
all of the following except
A) neutrophils.
B) macrophages.
C) dendritic cells.
D) natural killer cells.


The lymphatic fluid A
A) is a filtrate of the blood, as is urine.
B) is completely separate from the circulatory system
for blood.
C) carries both red and white blood cells.
D) functions in adaptive immunity but not in innate
immunity.
E) carries a toxic gas that kills cancerous cells.


An inflammation-causing signal released by mast cells C
at the site of an infection is
A) an interferon.
B) lymphatic fluid.
C) histamine.
D) mucus.
E) sodium ions.


A systemic inflammatory response that is often life- C
threatening is
A) mild fever.
B) aches and dull pain.
C) septic shock.
D) high blood pressure.
E) increased white blood cell count.


The eyes and the respiratory tract are both protected D
against infections by
A) the mucous membranes that cover their surface.
B) the secretion of complement proteins.
C) the release of slightly alkaline secretions.
D) the secretion of lysozyme onto their surfaces.
E) interferons produced by immune cells.

, Campbell Biology Chapter 43 Exam
Salmonella bacterial poisoning can be initiated when A
A) the microbe survives the acidic environment of the
stomach and resists lysosomal degradation in
macrophages.
B) the chemotactic messengers released by the
microbe do not attract sufficient neutrophils to entirely
destroy the infection.
C) there is a delay in selection of the population of
eosinophils that recognize and fight these microbes.
D) the microbes release chemical messengers that
make them resistant to phagocytosis.
E) The combination of foods eaten at the meal reduces
the pH of the stomach sufficiently so that ingested
microbes are not destroyed.


The complement system is D
A) a set of proteins involved in innate but not acquired
immunity.
B) a set of proteins secreted by cytotoxic T cells and
other CD8 cells.
C) a group of proteins that includes interferons and
interleukins.
D) a group of antimicrobial proteins that act together in
a cascade fashion.
E) a set of proteins that act individually to attack and
lyse microbes.


Antihistamine treatment reduces A
A) blood vessel dilation.
B) phagocytosis of antigens.
C) MHC presentation by macrophages.
D) the secondary immune response.
E) clonal selection by antigens.


Cave art by early humans recognized the existence of E
the major signs of inflammation. The most inclusive set
of symptoms of inflammation that might appear in such
early human art is
A) heat, pain, and redness.
B) pain and whitening of the surrounding tissue.
C) swelling and pain.
D) antibody-producing cells.
E) swelling, heat, redness, and pain.

, Campbell Biology Chapter 43 Exam
Ancient peoples sought to identify the indicators of D
inflammation because
A) seeing such signs would be cause for their seeking
out a healer in their community.
B) the presence of the signs of inflammation in a patient
could be a condemnation of the healer.
C) the ancients probably knew of plant derivatives that
could reduce the pain of inflammation.
D) the presence of these signs suggests that healing
was taking place/ otherwise, the patient would likely
die.
E) the signs of inflammation served as a caution to keep
people away from the patient.


The cells and signaling molecules that initiate D
inflammatory responses are
A) the phagocytes and the lysozymes.
B) the phagocytes and the chemokines.
C) the dendritic cells and the interferons.
D) the mast cells and the histamines.
E) the lymphocytes and the interferons.


Inflammatory responses typically include B
A) clotting proteins migrating away from the site of
infection.
B) increased activity of phagocytes in an inflamed area.
C) reduced permeability of blood vessels to conserve
plasma.
D) release of substances to decrease the blood supply
to an inflamed area.
E) inhibiting the release of white blood cells from bone
marrow.


Bacteria entering the body through a small cut in the E
skin
A) inactivate the erythrocytes.
B) stimulate apoptosis of nearby body cells.
C) stimulate release of interferons.
D) stimulate natural killer cell activity.
E) activate a group of proteins called complement.


An invertebrate, such as an insect, has innate immunity B
activity in its intestine that likely includes
A) complement.
B) lysozyme.
C) mucus.
D) neutrophils.
E) dendritic cells.

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