PNB 2265 Exam 2 Questions and Answers
with Verified Solutions | Latest Updated 2026
The primary lymphoid organs False
are lymph nodes and bone
marrow
True
False
Which function is common to B. Lymphocytes acquire their specific
both types of primary antigen receptors in primary lymphatic
lymphoid organs? organs
A. Production of lymphocytes
B. Lymphocytes acquire their
specific antigen receptors in
primary lymphatic organs
C. Production of lymph
D. Most immune responses are
initiated in one or the other of
the primary lymph organs
Lymph derives from _____ and A. Interstitial fluid; the systemic venous
travels to _____ via the lymphatic system
vessels.
A. Interstitial fluid; the systemic
venous system
B. Blood; arterioles
C. Blood; lymphatic capillaries
D. Interstitial fluid; lymphatic
capillaries
,Mast cells release _____ which B. Histamine; increase capillary
act(s) to _____. permeability
A. CSFs (colony stimulating
factors); cause local
vasodilation
B. Histamine; increase capillary
permeability
C. Kinins; activate complement
D. IL-1; activation of antigen-
presenting cells (APCs)
Which correctly describes an D. All of the above
event in the inflammatory
response to trauma?
A. CSFs (colony stimulating
factors) stimulate an increase
in neutrophils in the
bloodstream.
B. Proteins and fluid leak out
of capillaries, causing swelling.
C. Kinins provide a directional
signal for migrating
neutrophils.
D. All of the above
Diapedesis refers to the ability B. Neutrophils to move through a vessel
of ________. wall
A. Neutrophils to move
following a chemical trail
B. Neutrophils to move
through a vessel wall
C. Blood vessels to increase
permeability
D. Helper T cells to secrete
cytokines
, Which choice correctly lists C. Antibody binds bacterium; C1 binds
events in the CLASSICAL stem region of antibody; C3b binds
activation of the complement bacterium; self-assembly of MAC.
sequence? (Note: some steps
may be omitted. MAC =
Membrane Attack Complex.)
A. Bacterium secretes Factor
B; hydrolysis of C-3; self-
assembly of MAC; hydrolysis
of bacterium.
B. Antibody binds virus; C3
binds antibody and is
hydrolyzed; C1 - C9 form
MAC, which acts as an
opsonin.
C. Antibody binds bacterium;
C1 binds stem region of
antibody; C3b binds
bacterium; self-assembly of
MAC.
A person acquires D. Having a primary immune response
immunological memory to a
bacterial pathogen after ________
.
A. Becoming
immunocompetent
B. Cytotoxic T cells activate
C. Antibodies are transferred
from their mother during
breast-feeding
D. Having a primary immune
response
with Verified Solutions | Latest Updated 2026
The primary lymphoid organs False
are lymph nodes and bone
marrow
True
False
Which function is common to B. Lymphocytes acquire their specific
both types of primary antigen receptors in primary lymphatic
lymphoid organs? organs
A. Production of lymphocytes
B. Lymphocytes acquire their
specific antigen receptors in
primary lymphatic organs
C. Production of lymph
D. Most immune responses are
initiated in one or the other of
the primary lymph organs
Lymph derives from _____ and A. Interstitial fluid; the systemic venous
travels to _____ via the lymphatic system
vessels.
A. Interstitial fluid; the systemic
venous system
B. Blood; arterioles
C. Blood; lymphatic capillaries
D. Interstitial fluid; lymphatic
capillaries
,Mast cells release _____ which B. Histamine; increase capillary
act(s) to _____. permeability
A. CSFs (colony stimulating
factors); cause local
vasodilation
B. Histamine; increase capillary
permeability
C. Kinins; activate complement
D. IL-1; activation of antigen-
presenting cells (APCs)
Which correctly describes an D. All of the above
event in the inflammatory
response to trauma?
A. CSFs (colony stimulating
factors) stimulate an increase
in neutrophils in the
bloodstream.
B. Proteins and fluid leak out
of capillaries, causing swelling.
C. Kinins provide a directional
signal for migrating
neutrophils.
D. All of the above
Diapedesis refers to the ability B. Neutrophils to move through a vessel
of ________. wall
A. Neutrophils to move
following a chemical trail
B. Neutrophils to move
through a vessel wall
C. Blood vessels to increase
permeability
D. Helper T cells to secrete
cytokines
, Which choice correctly lists C. Antibody binds bacterium; C1 binds
events in the CLASSICAL stem region of antibody; C3b binds
activation of the complement bacterium; self-assembly of MAC.
sequence? (Note: some steps
may be omitted. MAC =
Membrane Attack Complex.)
A. Bacterium secretes Factor
B; hydrolysis of C-3; self-
assembly of MAC; hydrolysis
of bacterium.
B. Antibody binds virus; C3
binds antibody and is
hydrolyzed; C1 - C9 form
MAC, which acts as an
opsonin.
C. Antibody binds bacterium;
C1 binds stem region of
antibody; C3b binds
bacterium; self-assembly of
MAC.
A person acquires D. Having a primary immune response
immunological memory to a
bacterial pathogen after ________
.
A. Becoming
immunocompetent
B. Cytotoxic T cells activate
C. Antibodies are transferred
from their mother during
breast-feeding
D. Having a primary immune
response
