If the disulfide bonds in IgG were broken, how many peptide chains would be set free?
A) 2
B) 4
C) 6
D) 8
E) 1
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Question 2) The cerebellum adjusts motor activity in response to all of the following except
A) touch sensations.
B) visual information.
C) equilibrium-related sensations.
D) input from the motor cortex.
E) input from proprioceptors.
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Question 3) All of the following are true of the primary response of humoral immunity except that
A) it depends on antigen triggering the appropriate B cell.
B) it requires B cell differentiation into plasma cells.
C) it depends on memory B cells.
D) circulating antibodies undergo a gradual, sustained rise.
E) it peaks 1 to 2 weeks after the initial exposure.
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Question 4) Damage to the pyramidal cells of the cerebral cortex would directly affect
A) perception of pain.
B) sight.
C) voluntary motor activity.
D) hearing.
E) balance.
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Question 5) All of the following are true of the secondary response of humoral immunity except that it
A) depends on memory B cells.
B) results in much higher antibody titers than in the primary response.
C) results in much quicker rise in antibody titers.
D) produces more effective antibodies.
E) weakens quickly because memory B cells only survive for a year or two.
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Question 6) Some neurons within the basal nuclei are known to
A) stimulate neurons with GABA.
B) inhibit neurons with GABA.
C) stimulate neurons with acetylcholine.
D) stimulate neurons with GABA and stimulate neurons with acetylcholine.
E) inhibit neurons with GABA and stimulate neurons with acetylcholine.
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Question 7) During a primary humoral response to antigens all of the following occur except
A) B cells may differentiate into plasma cells immediately.
B) B cells may undergo several rounds of mitosis before producing plasma cells and memory cells.
C) antibody levels do not peak until 1 to 2 weeks after the initial exposure.
D) neutrophils invade the surrounding areas, releasing chemotactic substances.
E) the first immunoglobulins to appear in circulation are of the IgM type.
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Question 8) A brain injury to a patient results in facial paralysis. Which descending tract is most likely affected?
A) corticospinal tract
B) tectospinal tract
C) rubrospinal tract
D) corticobulbar tract
E) reticulospinal tract
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Question 9) A T cell can only become activated after being physically or chemically stimulated by the abnormal target cell in a process called
A) costimulation.
B) opsonization.
C) sensitization.
D) neutralization.
E) precipitation.
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Question 10) The upper motor neurons of the medial pathway are located within any of the following except the
A) vestibular nuclei.
B) reticular formation.
C) superior colliculi.
D) inferior colliculi.
E) mammillary bodies.
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