PNB 2265 EXAM 2 PRACTICE QUIZZES WITH
VERIFIED RIGHT ANSWER |GRADED+ .
The primary lymphoid organs are lymph nodes and bone marrow
True
False - Correct Answer -False
Which function is common to both types of primary lymphoid 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 -
Correct Answer -B. Lymphocytes acquire their specific antigen receptors in primary
lymphatic organs
Lymph derives from _____ and travels to _____ via the lymphatic vessels.
A. Interstitial fluid; the systemic venous system
B. Blood; arterioles
C. Blood; lymphatic capillaries
D. Interstitial fluid; lymphatic capillaries - Correct Answer -A. Interstitial fluid; the systemic
venous system
Mast cells release _____ which act(s) to _____.
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) - Correct Answer -B. Histamine;
increase capillary permeability
1
, Which correctly describes an 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 - Correct Answer -D. All of the above
Diapedesis refers to the ability of ________.
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 - Correct Answer -B. Neutrophils to move through a
vessel wall
Which choice correctly lists events in the CLASSICAL activation of the complement
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. - Correct Answer -C. Antibody binds bacterium; C1 binds stem region of
antibody; C3b binds bacterium; self-assembly of MAC.
A person acquires 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 - Correct Answer -D. Having a primary immune
response
B cell receptors recognize (bind to) specific ________________ .
2
VERIFIED RIGHT ANSWER |GRADED+ .
The primary lymphoid organs are lymph nodes and bone marrow
True
False - Correct Answer -False
Which function is common to both types of primary lymphoid 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 -
Correct Answer -B. Lymphocytes acquire their specific antigen receptors in primary
lymphatic organs
Lymph derives from _____ and travels to _____ via the lymphatic vessels.
A. Interstitial fluid; the systemic venous system
B. Blood; arterioles
C. Blood; lymphatic capillaries
D. Interstitial fluid; lymphatic capillaries - Correct Answer -A. Interstitial fluid; the systemic
venous system
Mast cells release _____ which act(s) to _____.
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) - Correct Answer -B. Histamine;
increase capillary permeability
1
, Which correctly describes an 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 - Correct Answer -D. All of the above
Diapedesis refers to the ability of ________.
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 - Correct Answer -B. Neutrophils to move through a
vessel wall
Which choice correctly lists events in the CLASSICAL activation of the complement
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. - Correct Answer -C. Antibody binds bacterium; C1 binds stem region of
antibody; C3b binds bacterium; self-assembly of MAC.
A person acquires 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 - Correct Answer -D. Having a primary immune
response
B cell receptors recognize (bind to) specific ________________ .
2
