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WorksheetsImmune System
Total questions: 15
Worksheet time: 8mins
Innate immunity.....
is activated immediately upon infection
depends on an infected animal's previous exposure to the same pathogen
is based on recognition of antigens that are specific to different pathogens
is found only in vertebrate animals
The most inclusive set of symptoms of inflammation is ________.
heat, pain, and redness
pain and whitening of the surrounding tissue
swelling and pain
swelling, heat, redness, and pain
The cells/signaling molecules involved in the initiation of the inflammatory response are ___, while cells/signaling molecules that initiate dilation of blood vessels are ___.
phagocytes and lysozymes
macrophages/chemokines; mast cells/histamines
dendritic cells/interferons; mast cells/lysozymes
mast cells/ histamines; phagocytes
The results shown in the accompanying graph support the hypothesis that ________.
Toll protein is necessary for protection from death by fungal infection
after fungal infection, wild-type flies die more rapidly than mutants lacking the Toll protein
flies lacking the Toll protein die within one day of a fungal infection
Toll proteins have a delayed affect in killing flies
Antigens are ____.
immunoglobulins.
used by the immune system to neutralize foreign objects.
foreign molecules that can initiate an immune response.
produced by white blood cells.
The immune response that is rapid but generic is called ____.
acquired
adaptive
individual
innate
Adaptive immunity is based upon ____.
traits common to groups of pathogens.
antigen-specific recognition.
maternal provision of antibodies to offspring.
plants being exposed to new pathogens.
A person who took a drug that destroys the thymus would most likely ___.
lack class I MHC molecules on cell surfaces
be unable to genetically rearrange antigen receptors
be unable to differentiate and mature T cells
lack innate immunity
The ability of one person to produce over a million different antibody molecules does not require over a million different genes; rather, this wide range of antibody production is due to ________.
increased rate of mutation in the RNA molecules
genetic DNA recombination
alternative splicing of exons after transcription
rearrangements of cytosolic proteins in the thymus cells
The activation of helper T cells is likely ________.
when an antigen is displayed by a dendritic cell
when a cytotoxic T cell releases cytokines
when natural killer cells come in contact with a tumor cell
in the bone marrow during the self-tolerance test
Arrange these components in the correct sequence of the mammalian immune system as it first responds to a pathogen.
I. Pathogen is destroyed.
II. Lymphocytes secrete antibodies.
III. Antigens from the pathogen bind to receptors on lymphocytes.
IV. Lymphocytes specific to antigens from the pathogen become numerous.
V. Only memory cells remain.
III → II → I → V → IV
III → IV → II → I → V
II → I → IV → III → V
I → III → II → IV → V
Which statement best describes the difference in responses of effector B cells (or plasma cells) and cytotoxic T cells?
Effector B cells secrete antibodies that are specific for a certain pathogen; cytotoxic T cells kill pathogen-infected host cells.
Effector B cells kill pathogens directly; cytotoxic T cells kill host cells.
Effector B cells confer active immunity; cytotoxic T cells confer passive immunity.
Effector B cells carry out the cell-mediated response; cytotoxic T cells carry out the humoral response.
You and a friend were in line for a movie when you noticed the woman in front of you sneezing and coughing. Both of you were equally exposed to the woman's virus, but over the next few days, only your friend acquired flu-like symptoms and was ill for almost a week before recovering. Which one of the following is a logical explanation for this?
Your friend had an autoimmune disorder.
Your friend had allergies.
Your friend had antibodies to that virus.
You had an adaptive immunity to that virus.
When you are injured, blood platelets release signals to activate more platelets. The new platelets then activate others. This is known as ___.
a positive feedback loop
a negative feedback loop
an immune malfunction
uncommon in animals
All of the following are parts of the immune system except _____.
skin
bladder
thymus
spleen
bone marrow
